Pelops
Pelops was the son of Tantalus. After being murdered and served up as stew by his own father, he was resurrected by the gods, though his left shoulder had been eaten before the gods discovered the nature of the meal, and he bore an ivory shoulder in its place.
Pelops doesn't seem to have committed child murder, incest, or cannibalism, making him quite the odd man out in the House of Atreus. This is not to say that Pelops was not a true son of Tantalus, however.
Pelops sought the hand of Hippodameia, daughter of Oenomaus. Oenomaus had received a prophecy that his son-in-law would kill him, so he demanded that every suitor for Hippodameia's hand must defeat him in a chariot race or die. He believed that he could not lose since the gods had given him winged horses and a divine chariot. Unfortunately for Oenomaus, Pelops bribed his charioteer Myrtilus to sabotage the chariot, causing Oenomaus' death.
Pelops showed his true colors by murdering his accomplice, Myrtilus. Unfortunately for Pelops, Myrtilus was a son of Hermes, who responded by cursing Pelops and all his house.