An incredibly wealthy character with an agenda. He's (usually a man) not looking for money (he already has it in spades), has a mysterious purpose and works behind the scenes, normally owns a megacorp publicly and other megacorps secretly. Charismatic, theatrical and intelligent, either old, handsome or both; most of the time he has great publicity as a philantropist. The protagonists are warned by others not to trust him. He is shown as a self involved loner that enjoys a combination of physical and intellectual pursuits and/or is obsessed with power/achieving his goal. Examples include Adrian Veidt (Watchmen), Wilhelm (Xenosaga), Bob Page/Morgan Everett/Hugh Darrow/David Sariff (Deus Ex series), The Count of Montecristo (Novel, Movie and Anime) Thomas Crown (The Thomas Crown Affair) The Illusive Man (Mass Effect 2) David Xanatos (Gargoyles) Lionel Luthor (Smallville)
Usually what happens when you give the magnificent bastard fiction 500 wealth.