Donovan Bailey is a double Olympic gold medalist for Canada. 

Bailey won the 1996 Atlanta Olympics 100m in a world record 9.84. He also anchored the 4x100m relay team to Olympic gold.

Bailey won the 100m World title in 1995, as well as the World 4x100m relay titles in 1995 and 1997; he anchored the 1995 sprint relay.

The 1996 Canadian 4x100m relay team was the first to defeat a United States sprint relay team in the Olympic Games. To put a finer point on it, Bailey won the 100m gold medal in a world record time of 9.84.

Bailey remains an icon of Canadian athletics and is in multiple Canadian Halls of Fame.

Joan Benoit Samuelson

In one of the greatest, most iconic Olympic performances by a US athlete, Samuelson won the 1984 Olympic Games marathon - the very first time the event was held for women. After an epic win in the US Olympic Trials in Olympia, WA - 17 days after knee surgery - Samuelson had recovered fully in time for the Games.

She made a bold breakaway move early in the race and quite literally ran away from the field. 

Both Grete Waitz and Ingrid Kristiansen came to rue the fact that Waitz let Samuelson go and Kristiansen based her race on Waitz's approach. Kristiansen later said it was the one race in her career that she'd like to do over. The Norwegians finished 2nd and 4th, respectively, while  Portugal's Rosa Mota captured bronze.