The hero famous for completing the Twelve Labors in Greek mythology is Heracles, also known as Hercules in Roman mythology. These labors were a series of daunting tasks assigned to him as penance, showcasing his incredible strength and bravery. The labors included slaying the Nemean Lion, capturing the Golden Hind, and retrieving the Erymanthian Boar. Heracles' story embodies the archetype of the tragic hero facing insurmountable odds yet achieving redemption through his feats. His adventures and exploits have made him a lasting symbol of heroism in various cultures.