Orpheus in Jason and the Golden Fleece
This minstrel of minstrels, bard of bards is probably most famous for losing his love, Eurydice, to the Land of the Dead. His journey to the Underworld to rescue her is a timeless and tragic tale. (More on that story here.) On the quest for the Golden Fleece, Orpheus earns his keep by playing a tune so beautiful that it drowns out the mesmerizing song of the Sirens. There's actually a whole version of the story called the Argonautica Orphica that emphasizes Orpheus's contributions.