Tyrion, Olenna, The Martells, The Greyjoys, (Yara appears to have found a lover in Ellaria) and Varys — maybe lie and pretend that Barristan Selmy is still alive too. The more I think about it, this seems too one-sided. All of the above and their attendant soldiers plus The Unsullied, the Dothraki, and Dragons against the Lannisters and The Other Greyjoys. Obviously, the King of the North and by Succession the Seven Kingdoms has colder fish to fry and would never align with Cersei — so Jon Snow-Stark-Targarian at best makes this more lopsided. There’s going to be a new major alliance, betrayal or plot shift or Cersei is going to be knocked off the map. Varys can’t be trusted; Littlefinger looms — there was the line about Sansa admiring Cersei; we don’t know where Melisandra is but she seems to lust after Jon a bit and possibly love-hate the Onion Knight (BTW, he’s got just the mix of pragmaticism, self-examination, experience, and benevolence to be a reluctant savior). My money is on Littlefinger marrying Cersei and one of those two dying soon thereafter.