I would go for Clark Gable.
Who was the best classic hollywood leading man? Humphery Bogart, Cary Grant, Marlon Brando, Rock Hudson, James Dean, Paul Newman, Errol Flynn, Jimmy Stewart, Clark Gable?
He might not have been the very best but Errol Flynn was sure one of my favorites !
I have to go with Clark Gable. Although Gone with the Wind is one of my all time favorite movies, there were so many more movies that he was wonderful in.