Read Jon Shield's, WSJ article and you'll know one: Manute Bol.
Bol, a Christian Sudanese immigrant, believed his life was a gift from God to be used in the service of others. As he put it to Sports Illustrated in 2004: "God guided me to America and gave me a good job. But he also gave me a heart so I would look back."Read the whole article here.
He was not blessed, however, with great athletic gifts. As a center for the Washington Bullets, Bol was more spectacle than superstar. At 7 feet, 7 inches tall and 225 pounds, he was both the tallest and thinnest player in the league. He averaged a mere 2.6 points per game over the course of his career, though he was a successful shot blocker given that he towered over most NBA players.
Bol reportedly gave most of his fortune, estimated at $6 million, to aid Sudanese refugees. As one twitter feed aptly put it: "Most NBA cats go broke on cars, jewelry & groupies. Manute Bol went broke building hospitals."