The hero famous for his quest for the Golden Fleece in Greek mythology is Jason. He leads the Argonauts on an adventurous journey to retrieve the fleece, a symbol of kingship and authority. Jason’s quest is filled with challenges, including encounters with the sorceress Medea and the clashing rocks. His story reflects themes of bravery, teamwork, and the complex nature of heroism, ultimately culminating in trials that test his character and resolve.