Kohei Uchimura
Japan
Japanese gymnast Kohei Uchimura won three Olympic gold medals in gymnastics (2012 individual all-around, 2016 individual all-around, 2012 team). His back-to-back individual all-around Olympic golds were the first since Sawao Kato in 1972, a 40-year gap. Nicknamed "King Kohei," he compiled a 40-meet domestic winning streak and six consecutive World Championship all-around titles, demonstrating the most sustained dominance in gymnastics history.