You're probably referring to Sciron. Who appeared in the story of Theseus. He fed his victims to a Monstrous Turtle at the bottom of a cliff, Theseus used this same Turtle to kill Sciron.
The one-eyed giant in greek mythology is the Cyclops.
most giant and monsters in Greek and roman mythology are just things the gods created and then discarded.
Antaeus in Greek mythology is the person who was known to draw his strength from the mother earth, who was called Gaia. He has hidden strength and was a giant who was known as a giant from Libya.
Enceladus is named after the Giant Enceladus of Greek mythology.
Ouranos and Gaia.
The name of the giant Cyclops in The Odyssey is Polyphemus. He is the son of Poseidon and Thoosa according to Greek mythology.
Orion.
His name was Orion.
The dragons of Greek mythology - giant, serpentine monsters with rows of sharp teeth; called Drakones.
The giant children of Uranus and Gaea were the Hecatonchires.
Mythology is filled with giants. In Celtic mythology, Tethra and Corb were giants. In Greek and Roman mythology, Cyclopes, Gigantes, and Gaia were giants.
Tityos was a giant from Greek mythology. He was the son of Elara; his father was Zeus.