The expedition that Shackleton was most famous for was not successful in its planned attempt to cross the Antarctic continent. Whether or not "organization" had anything to do with this I don't know. You may be thinking of Scott vs. Amundsen. However, the long effort of survival that followed the sinking of their ship eventually resulted in every man being saved at the end. Shackleton got credit for this, and rightfully so.

Just one day's sail from the continent, the ship Endurance became trapped in sea ice. Frozen fast for ten months, the ship was crushed and destroyed by ice pressure, and the crew was forced to abandon ship. After camping on the ice for five months, Shackleton made two open boat journeys, one of which—a treacherous 800-mile ocean crossing to South Georgia Island—is now considered one of the greatest boat journeys in history. Trekking across the mountains of South Georgia, Shackleton reached the island's remote whaling station, organized a rescue team, and saved all of the men he had left behind.

More info here.