House: Baratheon
House Leader: Stannis Baratheon 
House Members: List any notable members of your family. (WIP)
Lesser Generals: Davos Seaworth (WIP)
Special Unit: Storm Guard, originally made of veterans of the siege of Storms End, and still containing a fair few such men, this unit represents not just many of Stannis's most skillful and experienced soldiers but also his most determined ones. Men are selected for resilience, character and high moral just as much as for their sword arm. 

As a side note I'm just wondering how far we can take the retconing, especially since Melisandre is not there. I might just straight make up some supporting characters for Stannis . But without giving too much away for those slightly behind the curve would retconning the wife and children aspect be advisable since Melisandre isn't there? Or would you rather that be untouched? Also, if no one takes Renly, I'd be happy to NPC him as an independence or fold him into Stannis's camp. Though I admit that's a huge retcon. But I guess that will only become an issue of no one takes Renly.