13. Jaime Lannister
If these rankings were based on who had the most metal nickname, the Kinglsayer would win in a walk. But as it stands, going from sisterfucking and the attempted murder of a child in the pilot episode to saving the life of a former enemy (not to mention the population of King's Landing) by the end of Season Three is a transformation that takes him right to lucky thirteen. Pity it cost him his hand, but this is Jaime we're talking about — he's only a devil-may-care wisecrack away from shaking that off.