John Young is in the same league with Buzz Aldrin
They had John Young with Robert Crippen on the maiden flight of the Space Shuttle (STS-1 / Columbia / OV-102). John Young flew the missions were "failure was not an option". John Young jumps tall buildings with a single bound and bends cold steel with his bare hands. He's a god (Zeus, Apollo, Heracles, etc.) impersonating a human being. I doubt there is anyone around who can replace him.
Gary