The iconic marshal in question is Wyatt Earp, a legendary lawman of the American Old West. He was a deputy marshal in Tombstone, Arizona, and is best known for his involvement in the Gunfight at the O.K. Corral. Earp was also a gambler, teamster, and miner, and he had a long career as a lawman in various frontier towns. He is remembered as an iconic figure of the Wild West and a symbol of justice and law enforcement.