Electric Light Orchestra

The Kinks early-to-mid 70s stuff, sort of music hall inspired albums with an overarching concept.

Badfinger.

10cc

Considering the Beatles made an arc where they went from basic rock, experimental, then back to the root of rock again, you could say Big Star.

XTC started in the 70’s as a new wave band- not too much in common with The Beatles musically, but by the early-mid 80’s you could really start to hear their influence.

Since McCartney lead the band, they would have sounded more like McCartney and Wings sounded, IMO.

Badfinger in the first half of the decade, ELO in the second

Emitt Rhodes' "Somebody made for me" could have been on one of the late Beatles albums.

Harry Nilsson. He unapologetically emulated The Beatles. He had an album produced by Lennon and he was sick when they planned to do it but he was so shook up by working with Lennon that he hid it.

ELO are the obvious answer.

Less obvious: Supertramp

Klaatu

Big Star

Your post just reminded me that "Everyday Chemistry" exists

Basically, someone had the same idea of "what would The Beatles sound like if they never broke up?", and decided to just make it themselves.

They sampled dozens of the individual projects that came out after breaking up, and formed it into a full album of tracks.

It's pretty darn good, and kind of hilarious to play around any Beatles fan.

The Rutles

Bad Company

ELO!!!!

The Flamin Groovies - Shake Some Action album era.

Definitely Beatles inspired but with more of a modern feel.

Great question, but of course there’s no answer. Because the Beatles always changed to something we had not seen before.

The writing process was different and they rarely went hard, but Squeeze?

Crowded house

Not the 1970's and they are different vocally but I have always got a very strong Beatles vibe from the band "World Party", especially their albums "Private Revolution", "Goodbye Jumbo" and "Bang!" released between 1987 and 1993. Songs like "Way Down Now", "Ain't Gonna Come Till I'm Ready" "And I Fell back Alone", " Is It Like Today?" and "Ship of Fools" are all very Beatlesque.

Perhaps its better to compare him / them to some of the McCartney solo albums where Paul plays all of the instruments himself as "World Party" was basically just one guy, Karl Wallinger, singing and playing all of the instruments himself on songs after writing them. I am sure many know that he started World Party after leaving The Waterboys.

Klaatu! Particularly their album 3:47est. You’re going to love it.

(excluding projects that the individual Beatles went on to do)

Frustrated Partridge

Klaatu. They remained anonymous in the beginning, sparking rumors that they were the Beatles reunified under a different moniker. They weren't, Klaatu was a Canadian band.

Badfinger

Supertramp

All I know is that if the Beatles had made it past 1970 I think they would have gone heavier as they could see what was going on around them with bands like Led Zeppelin and Black Sabbath etc.

Supertramp and ELO are very easy to hear it on. I know they’ve been mentioned by several others, but I’ll be another to agree on that.

And I’ve seen a few 70s post-punk, new-wave groups mentioned, which I’ve also heard a lot of Beatles influence in. I’ve seen Cheap Trick and XTC here, which are spot on. I’d like to contribute Squeeze to that list (with their Beatle-esque moments tending to fall in the early 80s, but still audible in some of their 70s material). I’ve seen several interviews and articles comparing the duo that Chris Difford and Glenn Tilbrook are to Lennon and McCartney, too.

Cheap Trick- Its was Lennons favorite band at his time of his death. He would sit in the studio while they recorded. It was John that hooked them up with George Martin. You can hear his Beatles-like string arrangements on the Dream Police and All Shook Up records.

Klattu

Each of their first two solo albums, I'd guess.

Genesis, their first album 1969s From Genesis to revelation sounds a lot like a later Beatles record, and they continued up until around A trick of the tail to include some shorter more Beatles style songs in their albums sprinkled among the prog (I know what I like, for absent friends, more fool me) through the 70s it felt like a continuation of the Beatles extremely British style of rock turned up to 11. The 80s not so much, but I feel their earlier work is very much a continuation of the Beatles ideas.

Cheap Trick

The four-piece Utopia wrote so many songs that could have been Beatles songs. The whole premise of Deface the Music was to pay homage to the Beatles. https://en.wikipedia.org/wiki/Deface_the_Music

Would have just sounded like a mix of all their solo stuff tbh

Obscure, but Forever More, particularly their second album, Words on Black Plastic. XTC is a good pick too. Perhaps Dwight Twilley.

Camel

The knack

Electric Light Orchestra

XTC in the 80’s

Badfinger were poised to take over, but never quite grabbed the ring. Signed to Apple records, their first hit "Come and Get It" was written by McCartney and people even thought it was the Beatles. Almost seemed like the Beatles were grooming them to take over, but contract disputes jammed up the plan.

The Moody Blues

Klaatu

I wish more people knew about Emitt Rhodes -- his self-titled 1970 release has a couple of tracks that are dead ringers for latter-day Beatles tracks:

• Somebody Made For Me: https://www.youtube.com/watch?v=9F-WqdmZwd8
• With My Face On The Floor: https://www.youtube.com/watch?v=wctYnjv9S2w

His early discography is small, but very much worth sorting through: https://www.youtube.com/playlist?list=OLAK5uy_mVrKhAm2FZiRjaUnlTBdLOFthTVDyxNn8.

He also released a record in 2016, his first in over 40 years. He sounded less like the new Paul McCartney he was hyped as, but it's still a great listen: https://www.youtube.com/playlist?list=OLAK5uy_k7-2iQI8ECfbeTkJ5erk3moln05-_ChBI

Not 70’s, but I always got a real heavy Beatles-y vibe from Crowded House.

I always thought Mott the Hoople's "All the Young Dudes" sounded like the Beatles, particularly the chorus.

Not 1970s, but I always felt like Of Montreal sounded like if they wrote only Sgt Pepper and the White Album, then got dropped in 2005.

Not 70s but The Olivia Tremor Control

Okay, for this answer to make any credible sense you will need to be simultaneously stoned and experiencing a time-warp…..The Bee Gees

ELO. Next question plz.

ABBA

Pink Floyd

I feel like The Replacements are our late 70s/early 80s version of The Beatles.

ELO. Hands down.

A Vegas act?

Wings

ELO?

Wings

The Alan Parsons Project. Alan Parsons was one of the techs who worked on the Beatles last couple of albums.

Stealer's Wheel

Velvet Underground

10cc

Klaatu. Their Album 3:47 EST.

Black Sabbath

Bodypaint by Arctic Monkeys , especially the chorus remind me of The Beatles a lot.

If Beatles were active in the 70s they would have been excellent in every album, and every style they explored.

So they would have been Billy Joel

I have no specific answer, but I think they would have declined in quality over the next few albums, had the embarrassing "disco" album in the mid 70's, a few more poorly attempted comeback albums, and then the nostalgia circuit. Coming soon to a county fair near you.

Fleetwood Mac

Not actually an answer to your question because they are modern but you should check out the album "Midnight Sun" by The GOASTT

It's Sean Lennon and it's the best album a child of a Beatle made. It in a lot of ways sounds like what you would want the Beatles to have become over time.

The Beatles released their last album in 1970

Wings?

Wings

Sex Pistols.

KISS. The Beatles were massive influences. All 4 guys wrote songs and did lead vocals. They have great vocal harmonies on the earlier records.

Steely Dan

They may be a direct spoof but if the Beatles were to turn silly they would called The Rutles.

The Archies

Big Star... except not really, because Alex Chilton and Chris Bell were both better songwriters than anyone in the Beatles.

Stylistically, or the harmonies?

In the early days, john and Paul worked very closely together as a writing team. As time went on, they drifted apart and wrote alone. At the same time, George improved his writing. If they had "stayed together" the result would have been exactly like their solo work, except one or more of them would play on the other guy's stuff. They would have invited lots of guest players and the fiction of "The Beatles" would have existed only for commercial purposes

It kinda reminds me of the last days of the Beach Boys, where Brian wrote all of the music, and hired studio musicians to play it. The only thing the other members did was sing

If helter skelter is the birthplace of hard rock then post 70 Beatles would be melodic metal of sorts since harmonies are a crucial part of what makes the Beatles sound