29. Petyr 'Littlefinger' Baelish
There's something very American Psycho about King's Landing's stealthiest schemer, and it's not just his penchant for delivering monologues while naked women perform for his enjoyment. Littlefinger's mask of sanity is convincing enough to put him in charge of both the bank accounts and boudoirs of Westeros' most powerful people. Beneath it? A void of vengeance and boundless ambition. Keep your eye on this guy, if you can stomach it – especially now that he's wormed his way back into Sansa Stark's good graces.