Asmodeus

Asmodeus wants to rule the cosmos. Under his watch, he believes, the universe would take on a pristine, perfect state, with every living creature assigned a place in the infernal hierarchy. Wars would end, and every creature would have a purpose to fulfill. The universe would be a utopia, at least as Asmodeus views such a thing.
Of course, as he sees it, Asmodeus is the only being with the charisma, strength, and insight necessary to shepherd in this ideal future. His rivals are inferiors who, if left to their own devices, will turn the cosmos into a demon-infested maelstrom. The powers of good are sentimental fools, too delicate and soft to do what must be done. In his mind, Asmodeus has been chosen by the universe to protect it from annihilation.
If Asmodeus were any less capable, his arrogance would have led to his undoing long ago. Yet still he sits atop his throne, having thwarted every conspiracy mounted against him. He once walked into the lair of one of his enemies in Mount Celestia and survived using nothing more than his words and his wits. Even his most ardent enemies must grudgingly admit that his skill and competence are unparalleled.