"goody-two-shoes" gone bad

Anyone have any good media recommendations? I'm a bit fan of the "corrupt/selfish" type of thing when it comes to morals and character. Dunno, I just hate the cheesy "do no wrong" goody-two shoes type stuff. Bonus points if the character was good in the beginning and realised that being selfish and doing ill will to get ahead in the cutthroat game of life is a far better way to go, then eventually converted.