Actually, I have considered this but I havent found a consistent source of reference for the TV series costumes, like a miniature line or sth. I like some of the pics on the FFG card game but I find the boardgame minis by the same company cheesy.
So, find a unit roster of decent pictures and I am in.
House Arryn
House Baratheon
House Lannister
House Stark
House Tully
House Tyrell
House Targaryen
House Martell
House Greyjoy
That is 9 factions btw