None of them. When a player changes the rules because of their dominance, that's when it's evident.
You hear of Tiger Woods and other players affecting course design and changes. What you don't hear often is something altering the dimensions as perfect as a baseball diamond. Bob Gibson's 1968 campaign resulted in a lowering of the mound height. This master had a 1.12 ERA over 34 starts, 306 innings, 28 complete games. Five of his complete games were extra innings - 9 2/3, 10, 11, 11 and 12. He pitched a 12-inning complete game. That will keep a bullpen fresh.
All five of these guys are worthy, but Gibson stands alone.