I found JoJo borderline of what I could take. And perhaps the only reason for that is because the truly messed up stuff mostly just happens to no-name characters you don't know and who die quite fast.
Like a particular scene in Diamond is Unbreakable with a dog owner, a dog, and a serial killer. I'd rather not describe the scene
Thinking about trying the movies as well, though apparently nothing non-manga is the real Berserk experience. If you end up watching it before I do, let me know your thoughts on it. We're probably kinda similar in whether we'd like it.