In Greek mythology, the hero known for completing the quest of retrieving the Golden Fleece is Jason. He leads the Argonauts on an epic journey filled with challenges, highlighting themes of bravery, teamwork, and the pursuit of glory. Jason's quest reflects the archetypal hero's journey, encompassing trials that test his leadership, cunning, and resolve. This myth serves as a classic tale of adventure, emphasizing the ideals of chivalry and personal sacrifice in the pursuit of monumental goals.