The hero who embarked on a quest for the Golden Fleece is Jason. Leading the Argonauts, Jason's journey to retrieve the fleece from the land of Colchis is filled with challenges, including confronting the dragon that guards it. This quest symbolizes the pursuit of glory and rightful claim to power. Jason's adventures reveal themes of bravery, teamwork, and the complexities of heroism, as he faces both physical trials and moral dilemmas throughout his story.