Bob Richards is the only male Olympian to ever defend his pole-vaulting title. He won Gold in '52 and '56 (and bronze in '48).
He was a minister and a presidential candidate. When he asked one of his flock, Billie Jean-King, what she wanted to do with her life, the adolescent teenager said, "be the best tennis player in the world".
Jim Valvano heard him speak as a teenager, and his inspirational speech is noted by Valvano in the 30 for 30 episode.
https://en.wikipedia.org/wiki/Bob_Richards
He was the first athlete to ever appear on a Wheaties Box.
He was also the first Wheaties spokesman, setting up the Wheaties Sports Foundation encouraging participation in Olympics sports.