Model Decks for Game of Thrones The Card Game?
I did a quick search and came up with two good resources for this. First, some general guidelines for building cohesive decks that can work from ElitistJerks.com. The article lays out quite a bit of good information about this process that will probably help in determining how to create your decks.

Second, I found a website where players can post decks they have built. Other players can then rate the decks so you could get a feel for what people think is good (although most decks seem to go unrated as of right now). Each deck page has a list of cards in it, the description and how it is suppose to play, and other statistics on deck composition. The site is divided into each of the six houses, along with a list for neutral decks. This seems to be the best list for what you're doing, since you can focus on one house list and then move to the next when you're done.