Here in this 1971 interview at the Sgt.Regis Hotel John Lennon is asked by the interviewer about him using drummer Jim Keltner and if this was a reflection on Ringo's drumming.And John said, Oh no I love his drumming. He then said I think Keltner is a bit technically better but Ringo is still one of the best drummers in rock.
And who did John Lennon use as a drummer on his first brilliant solo album John Lennon Plastic Ono Band when he could have gotten almost anyone who would have jumped at the chance to play on one of John's albums? Ringo.
And Ringo Star was already a successful drummer in the most popular successful band in Liverpool,Rorry Storm and The Hurricanes when John,Paul and George asked him to join The Beatles.And George Martin didn't think that Pete Best was that good,and he and John,Paul and George thought that Ringo was much better.
Also Phil Collins and Max Weinberg are both Ringo fans. And Phil Colins ( who has always been a big Beatles fan and he was in the audience in the concert scene in their great movie A Hard Day's Night at age 13) says he can't even duplicate Ringo's great drumming in A Day In The Life. George Martin says that Ringo always had a great feel and ear for a song and that it was his idea to play the tom toms on A Day In The Life giving it a unique percussion sound.
Mark Lewisohn says in his great book,The Beatles Recording Sessions,that on a handful of occasions during all of the several hundred session tapes and thousand of recording hours can Ringo be heard to have made a mistake or wavered in his beat. He then says that his work was remarkably consistent-and excellent-from 1962 right through to 1970.