All sport hero's for me:
Eric Heiden (USA) - 5 times gold at the winter Olympics in 1980 in Lake Placid.
Wayne Gretzky (Canada) - no words needed
Randy Snow (USA) - one of the legends of wheelchair tennis
Ingmar Stenmark (Sweden) - Slalom and Giant Slalom skier in the '70s and '80s, had perfect technical skills
All the above made a big contribution for their sport.