Hmm... If you're looking for something like that, try out Death Note (which is really popular so you may have already seen it), Kamisama no Memochou, Kekkai Sensen, Cowboy Bebop, Black Lagoon, Higurashi, and I hiiiighly recommend Hellsing Ultimate.
Fullmetal Alchemist: Brotherhood, Attack on Titan, Tokyo Ghoul - I didn't like season 2 tho, One Punch Man, Bleach; and that's all I got. Bleach has a lot of episodes, tho, so beware. It's good show, but as you get deeper into it, there's a lot of fillers.