>>121688886George was pretty great. Not a virtuoso musician but his compositional sense was pretty great and he showed that in their later work.
Paul, as a musician, is on another level from the rest of the band. He's the omnicompetent musical savant.
John's the rock and roll edge, the /soul/ of the band. Its rebellion spirit, the thing that really made them seem like more than a pop act even in the beginning.
Ringo's the metronome.