Starting Rank: 5
The Tully seat should be a wealthy one, judging by its fertile land and central location. Unfortunately, this location also means that it's regularly torn up by every war that comes its way, and thus less likely to produce income. Volatile vassals such as Walder Frey, a noble who controls a lucrative crossing over a key trade route, likely translates into lower tax revenue even at the start of the show, leaving the Tullys with more than their fair share of headaches.
The top surviving Tully becomes a prisoner of the Freys and eventually orders his troops to surrender. It’s not clear what, if any, significant wealth remains by the time we reach the final season of the show.
House Baratheon
Current Rank: 8
Starting Rank: 8
One would think that the ruler seated atop the Iron Throne would also lead one of the richest families in Westeros, but King Robert Baratheon is the exception. He starts the series more than 6 million gold dragons in debt, owing 3 million to House Lannister alone.
By the end of Season 7, brothers Robert, Stannis, and Renly Baratheon are dead, although Robert’s illegitimate son Gendry appears to be on the up-and-up as a fleet-footed member of Jon Snow’s retinue. Survival is more than House Tyrell can claim.
House Tyrell
Current Rank: 9