Jackie Joyner-Kersee. Considered by many to be the greatest female athlete of the 20th Century, her heptathlon score (which won her the gold medal in 1988) is still a world record.

Jim Thorpe. Played pretty much every sport ever invented and was good at all of them.

Bruce Jenner. Did you know he used to be famous for something other than marrying a Kardashian? It's true. Jenner was the darling of the 1970s, along with John Travolta, the Village People, and the guy who invented the leisure suit. He also set a record in the 1976 Olympic games in the decathlon.

Usain Bolt. Chances are, if you could name a single track and field athlete, it's this guy. He's the fastest man alive. Seriously, though—the guy's last name is "Bolt." How could he not be good at running?

Wilma Rudolph. Won three gold medals in the 1960 Olympic games. She was the first American woman to do that. This also means she's won three more gold medals than we ever will.

Babe Didrickson Zaharias. Zaharias was the female athlete of the olden days. In 1932, women were only allowed to enter three events in the Olympics. She did so, and managed to break four world records in the process, implying she was capable of bending time and space, as well.

Alice Coachman. The first African-American woman to win an Olympic medal. She did this in the 1948 London games with an impressive showing in the high jump. Not only that, she did it with an injured back.

Jessica Ennis-Hill. Ennis-Hill won the gold in the 2012 London games in the heptathlon. Her prodigious skills and tireless work ethic are frightening.