First of all, I've found these funny southparked families: House Stark
Arya-Catelyn-Sansa-Eddard-Robb-Hodor Bran Rickon-Jon Snow
Today's House Lannister:
Tyrion-Tywin-Jaime-Cersey- Joffrey-Myrcella-Tommen
And now, let's go with House Lannister, notorious villains, bad boys of the series:
Tywin Lannister: Lord of Casterly Rock, Shield of Lannisport and Warden of the West, ruthless and controlling fifty-something years old. I cannot imagine sweet Charles Dance as "never smiles" cruel Tywin
Jaime Lannister: Younger twin to Cersei, inmensely talented swordman and warrior since youth and the sexiest male in the series, shameless and wicked villain as he is, is to be played by Nikolaj Coster Waldau. We'll see what he is able to do with this magnificent miscreant character (not that bad-looking, though :)
Tyrion Lannister is the third Lannister brother and he's not spared a single insult throughout the book: Halfman, Imp, dwarf, ... Nevertheless, he's the only Lannister endowed with something similar to feelings, and is full of cunning and brains. The choice here was almost evident because of his height: Peter Dinklage
Ummm, I have the feeling I'm forgettin someone but...
Ok, ok, yes, she, the one, the desirable quintessential evil bitch, make way for...
Cersei Lannister: Robert's wife and Queen, Jaime's... sister, everyone's dream (sometimes nightmare)
Lena Headey will play Cersei. Can you imagine her dyed blonde?