The hero known for slaying the Gorgon, Medusa, is Perseus. He was tasked with this dangerous mission and accomplished it with the help of gifts from the gods, including a reflective shield from Athena and winged sandals from Hermes. Utilizing clever tactics, Perseus beheaded Medusa while avoiding her petrifying gaze. His triumph symbolizes the triumph of heroism and intelligence over monstrous challenges, contributing significantly to his legacy in Greek mythology.