I am surprised nobody mentioned Howard Levy, the brilliant harmonica/keyboardist who used to play for Bela Fleck's Flecktones. He is the only harmonica player I know that can play sharps and flats on a diatonic harmonica. And who can play harmonica AND piano at the SAME time. And a very good composer in his own right. After Flecktones, he also was a part of the group Trio Globo. I also found him as a session player on many other recordings of famous bands. A very talented and unique musician.