Shura

Shura was a guerrilla fighter and part of the human resistance opposing the Daleks from an alternate Earth future. He was part of the group led by Anat that traveled back to the 20th century to kill Sir Reginald Styles. He was sent away to receive new orders from their base, but he was attacked an injured by an Ogron. Despite his injuries, he made his way back to the cellar of Auderly House, intending to use a dalekanium bomb to destroy the World Peace Conference that would be held there. The Third Doctor convinced Shura to instead use the bomb to destroy the Daleks (who had traveled back in time to stop the Doctor), thus sacrificing his life to prevent his timeline from coming to pass. (DW: Day of the Daleks)