The only males left in the show are: Jon, Brann, Sam, and Tyrion.
Jon shouldn't get the throne. He doesn't want it. He's not the smartest guy when it comes to strategy (how many wars did he almost lose only to be saved by someone else?), diplomacy (brilliant plan of losing a dragon to get proof for Cersei). He's too much like Ned. And if season 1 made anything clear, Ned was to idealistic and honor bound for that world.
Brann is the three eyed raven and a good substitute for professor Xavier. But he's a bit autistic. Also. Why isn't he warging into the dragons yet?
Sam would be a long shot. But I think he'd actually be a good ruler.
Tyrion, I doubt it. There's always the rumor he's also half Targaryen. I'm not sure if it's a revelation they'd save for the final episode. But I doubt his arch develops further. I'm still not sure why Cersei didn't kill him at the gates of King's Landing in episode 4.
What of the remaining girls? Sansa Arya and Dany? (There's Brianne, but she's not getting the throne. And what ever happened to Yara? She still at the iron islands?)
Dany is now the villain. Her last remaining role is to either die, or perhaps end the series with her on the throne. I'm betting on the former.
Sansa should remain the queen on Winterfell, or what ever her title is. It would be a long shot for her to end up as Queen of Westeros.
Arya killed the night king. Is she the legendary Azor Ahai? She did kill the night king. But her arc doesn't really feel like it leads to the throne. Maybe?
Other mentions, Robin Arryn, what happened to him? Gendry, he's now the recognized son of Robert Baratheon, perhaps the throne returns to him?