Ishamael/Moridin - at large
Lanfear/Cyndane - at large, mind trapped
Graendal - being punished by Shadar Haran, but presumed at large
Demandred - at large
Moghedien - at large, mind trapped
Mesaana - in Aes Sedai Custody, vegetable
Semirhage - Balefired by Rand
Rahvin - Balefired by Rand
Aran'gar - Balefired by Rand
Be'lal - Balefired by Moiraine
Asmodean - killed by Graendal, presumably by Balefire, but unconfirmed
Sammael - Killed by Mashadar, soul beyond the DOs power to transmigrate
Aginor/Osan'gar - burned to death by Elza, could potentially return

So only Aginor or Mesaana (if Egwene kills her) could make a return appearance.