TRiUMPhant?

There's no need to name this person. The whole World knows who he is, and that's the way he prefers it.

That very aspect could be where some of the outlandish behaviour comes from, though I doubt it's really that simple.

This person has a patholgogical desire for power, control and wealth that is often accompanied by delusions of grandeur.

Striving for absolute power while showing little humility and often exhibiting narcissistic behavior, perfectly describes this person.

These are all traits of a meglomaniac.