Based on odds offered by Bookies:
Can't see why anyone believes Bran Stark is a contender.
Of all the possible outcomes, Bran ruling the Seven Kingdoms is the one that makes the least possible sense. Also can't picture Sansa, Arya, or Gendry.
The six possibilities as I see them:
1. Nobody (the Seven Kingdoms cease to be ruled under one monarch.)
2. Jon, without Dany.
3. Dany, without Jon.
4. Jon and Dany as a couple.
5. Cersei.
6. Nobody (the Night King prevails and destroys everything.)
But perhaps something completely unexpected happens on the way to the fireworks factory...
-k