Things that set the Beatles apart:
1. They weren't limited to a single sound or style...they also tended to adapt their style as the years went on, listen to a song like I Want You (She's So Heavy), compared to Roll Over Beethoven. They're so different, yet both are instantly recognizable as the Beatles.
2. They were innovators of engineering, recording, and mixing techniques (due largely to George Martin, who is a badass in his own right).
3. Lennon and McCartney were some of the best songwriters ever.
4. Their playing was idiosyncratic, and awesome. Paul played melodic, active basslines, which was far away from the norm at the time and innovative in its own right. Ringo played a simple kit, and was pretty minimalist, but he has perfect timing, and his fills and accents perfectly filled out their sound. No one had been like them.(To be fair, this applies to Hendrix, from your list, he was a true innovator as well).
5. They sold an absolute SHIT TON of albums.
I believe your statement is ridiculous. Their music was original and awesome.
And just for fun - if the Beatles' music was so terrible, why did Hendrix himself cover Sgt. Pepper's the day after it was released? (Awesome video by the way, try to find it somewhere)