So the seven are Father, Mother, Maid, Warrior, Smith, Crone and Stranger, however since GRRM loves to subvert fantasy tropes each character will be a character that fills the role untraditionally. IE Dany = Mother, the goddess of fertility despite being Sterile ect I'm guessing the final 7 will be Jamie, Tyrion, Jon, Dany, Aria, Sansa and Brieanne
Or maybe the Crone will be Melisandre. People are speculating she might die/be dying with the whole Jon situation and her being so old, and I'm not dismissing the idea, but she could just as well survive somehow, forever lamenting how wrong she's been all this time.
So :
- Dany would be the Mother despite being sterile - or Cersei even though her children are pretty much all dead and she attempted to mercy kill one of them
- Sansa would be the maid despite being raped countless time by Wonderboy Ramsay; if not her, Brienne
- Jaime would be the Father, or the Warrior
- Arya would be the Stranger, obviously
- Jon would be the Warrior (TPTWP/AA, yadda yadda yadda), or Brienne
- The Smith would be... I dunno, Brienne? Eh.
- Either Cersei or Mel would be the Crone... Unless the show DOES bring Lady Stoneheart in the end lol
Of all those, I'm thinking some of them might die, to be honest, namely Mel (see above), Brienne and/or maybe Cersei.
Other people I'm definitely expecting to stay alive in some way until at least the beginning of the last season are Theon and Bran. Bran is basically an immortal tree anyway, and the show will probably go the same way.
And Benjen Stark lol.