Best Piano-Rock?

[OldFogey]

Piano:
John Lennon
The Beatles (in like 50% of their songs)

I don't think so. Paul played more piano than John. George Martin handled the harder keyboard parts (the harpsichord in In My Life). And Billy Preston carried most of the load in the later songs.

I have no idea what the actual percentage is of songs on which John played piano, but I would guess closer to 10%.