The Beatles aren't just about music - it's the whole 60's era and they were riding the wave for most of it so they're hugely important from a cultural perspective as well as musically.
I really prefer the Stones' music to the Beatles'; The Who were more revolutionary; Pink Floyd were far more intelligent musicians and lyricists; The Kinks were much
sexier... but the Beatles evolved & 'led'
and this is why they're more influential than all of those supergroups because they were of the time and then they 'died', so they're legend and forever fixed in that decade as THE Supergroup.
Lennon was a nutcase - a self-destructive genius and his lyrics and conceptual ideology were for the most part brilliant and his vision and McCartney's talent for the attractively commercial pushed the Beatles into superstardom at a time where there'd never been anyone quite like them, so no - they were
great even if you don't like them or their music.
Greater than Elvis because they were far more original and less commercially led (and Elvis was also hugely conventional too as pooh says, with him doing National Service, although he didn't get sent to 'Nam) but he's important in the same way, because he was the first of that New Wave and his early image and work caught the imagination of the resentful bored teenagers in the late 50's/60's the world over - they'd never been a 'power' demographic faction before collectively, but everything began to change globally
with Elvis-mania and became unstoppable with the Beatles because they caught people's imaginations and changed the way we thought and lived
That said - it's only us old fogies who remember what it was like before (or had parents who did!) so you are excused not liking them or Elvis