For many years, near-endless debates have been had about (1) who would be the best ruler (in theory, out of all possible candidates), and (2) who would be the actual ruler (or "winner") in the end.
Turns out both questions have the same answer, I think: Bran Stark.
Incredibly wise and knowledgeable, consummate good (I can't recall ever seeing or reading even the faintest hint of darkness or badness in him; he was always clearly one of the most "pure good" characters in the story), and since he doesn't "want" anymore, he is, presumably, incapable of being corrupted.
Also, he's very young (which means there's a great chance he can rule for a long time and they won't have to worry about replacing him for an equally long time; indeed, as I recall, the 3 Eyed Ravens live incredibly long lives, right? As I recall, Bran's predecessor was well over 100 years old), and the people who named Bran king seem to think it's good that he can't have children.
Add all of that up, and no other candidate is even remotely close to being as well qualified as Bran.
And as an added bonus, they are set up perfectly for a sequel one day, with a very young actor/character as one of the centerpieces (along with Arya, Gendry, and Ser Podrick).
Bottom line: If I lived in Westeros, there is no character we have seen that I would rather have as king or queen than Bran, and I'm glad that was the judgment of the characters who actually made the decision, too.