Orpheus
Orpheus was married to a dryad named Eurydice. In one version of the myth, while trying to get away from a satyr Eurydice was bitten by a snake and went to Hades. Orpheus rode the ferry across the river Styx to bring her back from the underworld. He played his lyre to make Cerberus fall asleep, and moved the wife of Hades, Persephone, with his music. She said he could take Eurydice back to the upper world if he didn't look back at Eurydice until they both got back up to the land of mortals. Racked by doubt, he did look back just before reaching the upper world, and so she was returned to the realm of Hades forever. He was killed by a group of Maenads when they became tired of his mournful music over Eurydice, and his head was cast into the sea.