My prediction (Don't read if you aren't upto date on the episodes!) -
Jon ends up on the throne but as first act he disbands the one ruler, gives the regions their independence and their own kings/queens.
The only survivors are the remaining Starks, Jon, Tyrion, Gendry, The Hound, Turmond, Jamie, big Brianne and Bronn.
Not convinced that Brann is the Night King anymore, I think he will be a Stark but one of the original Starks.