Carl Sagan was a renowned American astrophysicist and science communicator. He made significant contributions to the search for extraterrestrial life and popularized science through works like 'Cosmos' and 'The Dragons of Eden.'
This is based on winning 7 head-to-head matchups with other famous people, but also losing 20 head-to-head matchups.
Most recently Carl Sagan lost a matchup to Stephen Fry (#300) voted by someone from Canada.