"7 Kingdoms" is a bit of a misnomer. There are more big houses & partitions in Westeros than that- but there were 7 when Aegon I Targaryen came to power. Dragonstone, the Targaryen seat, is an island & thus not counted in the 7 for whatever reason. Until Jon breaks whatever vows he needs to break this time & knocks up another hot ginger wildling, there won't be any Targaryens for Dragonstone.
"Despite its name, the Seven Kingdoms is a realm divided into nine administrative regions or provinces: the crownlands, Dorne, the Iron Islands, the north, the Reach, the riverlands, the stormlands, the Vale of Arryn, and the westerlands. These include former kingdoms such as the north, the Reach, the stormlands, the Vale, and the westerlands. "https://awoiaf.westeros.org/index.php/Seven_Kingdoms
Sansa = Independent Queen of the North, Tyrion = Lannister (Casterly Rock is the seat of the Westerlands), Yara Greyjoy = Iron Islands, Robin Arron = the Vale, Oberyn Martell's brother = Dorne - all yes.
There was a Tully there - Edmure, the younger brother of Caitlyn Stark. He had the Tully black fish on his collar. The awkward guy that Sansa told to sit down.
That family would be from the Riverlands.
Bronn has Highgarden & is the master of coin at the end. Talk about right place, right time - that whore banging smart ass money grubbing.... nerfherder?
Gendry's bastard status was removed & he was given the name & Stormlands of the Baratheon family by Dany a couple of weeks ago. He then tried to marry Arya & she wal all "lol no" even though they banged.