Revolver for me is the bridge between the early and late Beatles, containing both something like Yellow Submarine (one of the few Ringo tracks not on perma-skip) and Tomorrow Never Knows. I think it's their absolute peak. I'd place Abbey Road next but it's dragged down by the execrable Maxwell's Silver Hammer. If they'd put Strawberry Fields and Penny Lane on a proper album (say, with a track like In My Life, which is one of their absolute best) then that would have been a world beater but I can't really take Magical Mystery Tour as a serious album. Just my twopenn'orth...