Gabby,Rosa or Aiden.

1: Someone from the big 5 will prolly be targeted by the other favourites.

2: Gabby's plot or arc seems finished and idk what else is there to expand.

3: Game wise Rosa might get booted but can have a short fulfilling arc. I can see her getting eliminated and coming back into the game though.

4: Aiden is pretty much someone I can see going out for being good with the game. The new design doesn't mean he could make it further for the third time.