The focus on what happens in the North made me think a bit more about the late Roose Bolton.
Half ironic question, what has he done so wrong, aside the Red Wedding? Sure, in that occasion he was a treacherous bastard and for that he deserved a far worse death than the one he got, but unlike for example Joffrey, did he ever remind you "yeah, this is why this traitor needs to die"? he was an intelligent reader of the chessboard of Westeros, every advice he gave to Ramsay was the best one and he was actively teaching him how to survive in the political landscape. He never threw tantrums or killed people just because, and he showed respect for Sansa and even Theon, never humiliating them, and there is no indication that he mistreated his wife, even though he has no shame in admitting he picked her for her size and consequent payment in gold.
The Red Wedding damns him even if he would single handedly stop the invasion of the White Walkers, but if he didn't take part in that, I would hardly even consider him a villain.