I've met Bernard Purdie and he is the nicest unassuming guy. Had dinner with him with another drummer I work with, Geoff Daking from the Blues Magoos (Geoff makes pro audio gear). I am surprised no one has mentioned Jeff Porcaro- did I miss it? He made famous one of Purdies unique beats, the "purdie shuffle" or "half time shuffle groove". Jeff used it on Toto's "Roseanna".