The famous Greek hero known for his shield bearing the image of Medusa is Perseus. He is celebrated for slaying the Gorgon and utilizing her severed head to defeat enemies, as its gaze could turn foes to stone. Perseus's story highlights themes of bravery and adventure, emphasizing his role as a protector against monstrous beings in Greek mythology. His adventures are documented in various legends, showcasing his valor and ingenuity as a classic hero archetype within the ancient Greek narrative.