The Fourth Generation
Old leader of the Exemplars, strong, fly, mostly invincible
One of the most powerful supers in the world. He is strongest, fastest and invulnerable. He found that he could handle most villains by himself but was concerned about two holes in his defense of Earth. First, he could had weak mental defenses and could easily be taken over by telepaths. Two, he could be everywhere all the time.
This is why he created the Exemplars with Dr. Cosmos being the second Exemplar who could handle the villainous telepaths. With other heroes he could defend all of Earth from its greatest foes.
However, Omega is old fashion with a black and white sensibility. In the late 80s and 90s it was decided he could no longer lead the Exemplars and leadership was switched to Dr Cosmos.
He has never approved of the decision.