Dreadhead...I think that you answered your own question. Charlie Watts is a drumming timepiece...spot, dead on and correct me if I am wrong on this, but his background is / was in keeping time in big band jazz. I also thought I read once where Mick and keith went to him on the new songs arrangements and what tiempo the song would take. Ringo Starr is a whole different type of drummer and as important, type of band and music played. Ringo was the right drummer for that band...any other drummer, well who knows what path the Beatles would have taken and ended up on.....yes, he had flair and was a pretty good drummer as well in keeping time.
Baker, Bonham & Moon....again totally different drummers and music played. But, the thread is about Watts and Starr ....not about those guys.