One of a kind. They broke the mold. There will never be another.........(whom)? Why?

For starters

Lucille Ball
Carol Burnett
Art Carney
Andy Griffith
Humphrey Bogart
Gene Kelly
Ella Fitzgerald
Cyd Charisse
Fred Astaire
Eleanor Powell (by far best tap dancer I ever saw)
Will Rogers
Bobby Jones (golf)
Michael Jordan (basketball)
Lou Gehrig (baseball)
Bobby Orr (ice hockey )
Roger Federer (tennis)
Racing ?
Football?
Boxing?

Who are YOUR one-of-a-kinds?