Prometheus from Hesiod’s Theogony

Prometheus was the son of Iapetus, one of Oceanid’s Titan sons. His brothers were Menoetius, Atlas, and Epimetheus. 

Most notably, he challenge Zeus and his power. To challenge Zeus’s omniscience, Prometheus set up a trick. He placed two sacrificial offerings before Zeus. The first was a piece of beef hidden inside an ox’s stomach, symbolizing nourishment hidden inside an unappealing exterior; the second was a plate of bones wrapped with fat, symbolizing something appealing hiding the trick inside of it.

When Zeus realized the trick, he became furious and hid fire from humans as punishment. In return, Prometheus stole fire back from the God, using a giant fennel-stalk, and gave it back to humanity. 

As eternal punishment, Prometheus was chained to a rock and an eagle would visit him every day to slowly peck and eat his liver. His liver regrew every night and the torture to continue for the rest of eternity.