I didnt know Paige only had 28 wins...
IMO, W. Johnson is the best, but Koufax had to face the toughest era to get those wins. But when Clemens is finished with his career, he will be one of the top 10 pitchers in baseball, be the top five starters in wins, strikeouts etc.. and face probably the toughest era in the history of the game (hell 2 of Barry Bonds' 10 strikeouts came from this man.)