Fan Casting Arkham Asylum (Limited Series)

If there was a Max (HBO) TV miniseries about Arkham Asylum, and the questionable experiments and secrets behind the staff that run it, conflicting with the psychotic patients. I don’t care if it’s Reevesverse or not, I suppose it doesn’t matter much, but I want a specific tone the casting. Dark and grounded, much alike the Reeveserve, so let’s say it is just as an idea for the tone. Please don’t go and cast stupid things or ones that could play the characters, but not in this type of show. I don’t want to see tons of Hollywood movie stars either as it is a miniseries. I’d guess 6-8 episodes will do the trick. No sign of Batman by the way