Although it's probably a stomp in Omni-Man's favor, but from what little I know about Invincible,
Asimov might be a good matchup, as a battle between two father figures to the main protagonist (Omni-Man is literally Invicible's father while Asimov is generally considered to be a father figure to Gunvolt) who become
broken pedestals to them. However, neither one really hates their "son" even when they go against them (Omni-Man for obvious reasons, and Asimov literally wished Gunvolt good luck as his dying words).
I'd need to see Invincible first before I can tell if this is a good match or not, though.