Shouldn't Antronachs be in the Daedra category?
They were separate entities in Daggerfall, they had the atronachs, and they had fire and ice daedra. Atronachs were meant to be golems.
They started lumping together in Morrowind, I'm not sure why.
As for my vote, Ghosts/wraiths, that is if I get to punch them in the face, cause punch ethereal undead in the face is always funny.
I would like to see the Daedra Seducers return, the ones that shed their clothes and sprouted wings before kicking your ass.