I really need a new dark S-tier anime addiction

I just rewatched Attack on Titan, and I think it’s officially my favorite anime of all time so far. I also absolutely love others like Jujutsu Kaisen, Vinland Saga, Fullmetal Alchemist, One Punch Man, Death Note, Cowboy Bebop, Hunter x Hunter, Monster, and Parasyte. I’m looking for something new with that same dark vibe that hooks you right from the start. Any recommendations for my next obsession?