I just caught that he directed "Bone Tomahawk" with Kurt Russell.
That's been in my Amazon Prime queue for one of these evenings. I've heard it is a brutal film.
I recommend that one too. Zahler likes to work with “our” side as Kurt is pro-2A. Yeah you could say it’s gory brutal. About a sheriff and his posse out to get Cannibal Indian/native/zombies etc who were going into town and kidnapping people for food.
Do NOT watch that movie. I don't exactly have a weak stomach, but there is at least one scene that made me want to hurl.