Although I didnt get to see most of his career there being a little too young, the numbers dont lie. As great as Gretz was for LA and American Hockey in general, Marcel has simply too amazing of stats as a King to ignore. Him playing more years as a King in the end does it for me, although you can hardly go wrong with Wayne.
I had to go Gretzky. I wanted to vote Dionne, but Wayne with the Kings, broadened the game in the US. There are plenty of sun belt teams that owe their existence to his tenure in LA. As great as Dionne was, Gretzky was better.