Canada obviously has Gretzky and he would win any poll.
But we also have others like Lemieux and Steve Nash who need mention. Steve Nash in particular as he broke thru in a sport few Canadians played at the top levels in at the time. So he did not have the steal sharpening steal thing that the hockey players have.
I think Ben Johnson and Donovan Bailey are also up there for Canada (I ignore Ben's roids bust in an era when they were covering up Carl Lewis's).
And then there is our very own GSP who may well go down as the undisputed GOAT of MMA as he battles now only with Fedor for that honour.