The Greek hero known for his cunning intelligence is Odysseus. He is the protagonist of Homer's Odyssey, renowned for his cleverness and strategic mind. Odysseus' intelligence enables him to navigate treacherous situations, such as outsmarting the Cyclops and devising the Trojan Horse, which symbolizes the triumph of intellect over brute strength. His adventures illustrate the importance of resourcefulness and adaptability, cementing his legacy as a quintessential hero whose wit often proves more formidable than traditional martial prowess.