John Glenn was an American astronaut, Marine Corps aviator, and U.S. Senator. He was the first American to orbit the Earth in 1962 and flew into space again at age 77 on the Space Shuttle Discovery.
This is based on winning 36 head-to-head matchups with other famous people, but also losing 84 head-to-head matchups.
Most recently John Glenn lost a matchup to Eli Manning (#1300) voted by someone from United States.