Shaun White
Shaun White took home gold in the halfpipe competition in his first two Games: 2006 and 2010. In 2014, he competed in Sochi but fell just short of winning bronze. He suffered a horrific accident that resulted in 62 stitches in his face which halted his snowboarding progress. He competed in 2018 and took home the gold. 2022's Games will be his last run.
Usain Bolt
The world was obsessed with Usain Bolt between 2008 and 2016. He was quickly called the fastest man in the world due to his insane speed at the Games. He won eight gold medals as a sprinter and set world records in the 100m, 200m, and 4x100m races. He retired in 2017 but has enjoyed working with endorsements and brands since then.