I Wanna Be Your Man is a decent Ringo vocal, and With The Beatles is - no coincidence - a strong contender for this thread. As is A Hard Day's Night (Ringo's title, but no vocal track).
I'd agree about Revolver if it wasn't for Yellow Submarine.
In the days of cassettes I had a C-45 and made a single album out of the Beatles' White Album. If they'd done the same it would have been their best.