[@Gnome Johnson] I hope I'm not coming off overly difficult or anything, I'm just trying to help you make your sheet as good as possible and in line with the lore. 

As for houses, there are quite a few houses that are not played by anyone. House Baratheon, and specifically Lord Borros has only been NPC'd so far and House Tyrell is completely open if you wish to take on a Great House. Otherwise, you can always take on another house but still have a big role.