This is so brilliant I'm surprised someone didn't think of it sooner. Imgur user anthonybooyay took the flags of the 50 U.S. states as well as The Virgin Isles, Guam, Samoa, Puerto Rico, and Washington D.C. and reimagined them as House banners in the theme of HBO's Game of Thrones series. Here's my current state of California:
And my home state of Texas:
I propose these replace all existing flags immediately. Write your congressperson.