The Beatles influenced, and continue to influence, many other major rock acts. If you study their music--especially the post-1965 stuff--you'll find that it's a lot more complex than it sounds. There have been very, very few bands in history to make airplay with music that is as different and yet simple-sounding as the Beatles'.
I mean, consider the verse chord progression in Being For The Benefit Of Mr. Kite: Cm G+ Bb Dm G
Simple pop? I don't think so.