I'm torn on this one(lean towards Gretzky b/c of the longevity) but I do want to say that saying, 'put 'em all on a pond and Orr gets picked first everytime' is a pretty lousy argument for best of all time. All time includes the entire career, not just the respective peak. Breaking down their careers to a contest about who gets picked first on a playground is not really helpful when trying to figure out who is the best.