Roald Engelbregt Gravning Amundsen (1872-1928) Norwegian explorer of polar regions. He led the Antarctic expedition to discover the South Pole in December 1911 and he was the first expedition leader to reach the North Pole in 1926.
Tom Krean - second officer to Ernest Shackleton on The Endurance. Absolutely one of the most inspiring documentaries ("The Endurance") I've ever seen. If you ever think about giving up, watch that and rethink your position!
Frank Wild accompanied Shackleton on four adventures to Antarctica, acting as his second-in-command as they attempted the first land crossing of the continent and later taking control of the expedition on which Shackleton died. After the Yorkshireman's death aged 66, in South Africa in August 1939, his widow had him cremated so that his final wish of being buried next to Shackleton on the island of South Georgia in the South Atlantic might be possible.