Malebolgia

Malebolgia was originally considered an embodiment of Satan within the Image produced series known as Spawn - however after the entity was defeated by Spawn his status as Lord Of Hell was passed onto Mammon, Malebolgia's position as Lord Of Hell fell even further into decline when the true Satan of Spawn's world revealed himself after centuries of banishment alongside his cosmic-twin God (though it is worth noting "God" in Spawn is not the same being we think of in religious terms).

Malebolgia acted as the chief antagonist of Spawn for over 100 issues until his ultimate downfall and held great power, though it was later revealed he was "but a flea" compared to beings such as Mammon, yet for a long time such beings served him loyally (or at least acted loyal) - one of Malebolgia's most infamous henchmen was the Violator, who would become an archenemy of Spawn throughout the series.