Source: villains.wikia.com

5. Omni-Man

(Invincible, Image Comics)

Invincible is one of the most impressive long-running superhero comics of all time.

Mark Grayson’s story has stretched on for years, and it’s supposedly coming to an end soon. But its opening arc is absolutely phenomenal. Mark is the son of Omni-Man, a glorious mustachioed Superman analog from the planet Viltrum, who settles down and has a kid.

When Mark’s powers kick in, his father begins training him to be a hero. Taking the name Invincible, Mark begins a long and fruitful career as a hero. But all is not as it seems, because Omni-Man kills off all of his teammates in the Guardians of the Globe, and declares his intentions to conquer the earth for the Viltrumite empire. Mark, understandably, freaks out and fights back. And…His sobbing father beats the piss out of him, and then disappears into space.

Omni-Man later comes back to Invincible numerous times, eventually redeems himself, and becomes the hero everyone thought he was.