Highschool of the Dead Another Corpse Party: Tortured Souls Higurashi When They Cry Parasyte: The Maxim Elfen Lied Monster Vampire Hunter D Hell Girl Yami Shibai: Japanese Ghost Stories Puella Magi Madoka Magica Shadow Star Tokyo Ghoul Mononoke Shiki Pet 샵 of Horrors Paranoia Agent Serial Experiment Lain Blood+ Ghost Hound Devilman Gantz Blue Gender Pupa (Scary in 더 많이 ways than one)
Tokyo Ghoul Black Butler Another Death Note Deadman Wonderland Blue Exorcist (If that counts) Parasite Hellsing Ajin Corpse Party Akame ga Kill I can list 11 easily. All of these I watched.