I often think about who was most revolutionary to the game of hockey...probably because my choice would be Bobby Orr and what he did basically creating the need for a whole new type of defenseman. Some others that often come to mind are Patrick Roy for his revolutionary "butterfly" which has spawned an entire generation of goaltenders. Gordie Howe/Bobby Hull are in there too with curved blades which made shots harder and more accurate. What are some other names out there that have most changed the game? Who has changed the game the most?