I disagree with most of what you say, but will concede that George was a.. lazy guitarist. The rooftop concert. The 'All You Need Is Love' solo. Even McCartney and Lennon eclipse him at the end of the Abbey Road medley. But he was a bit off-the-wall, influenced the direction of the band and wrote handful of classics.
I strongly disagree re: Ringo. Even Bernard Purdie rates him enough to try to steal his credit.
McCartney's 'twee' stuff often has a bit of a sinister undercurrent which appeals to me, and I have no problems with Lennon's voice.