I've read and/or watched:

07 Ghost
Bleach
Blood+
Clamp School
Code grease
Death Note
Detective Conan
Detective School Q
Devil may cry
Elfien Lied
Getbackers
Ghost Hunt
Ghost stories
Hunter x hunter
Jigoku Shoujo
Kaze no stigma
Kuroshitsuji
Majin Tantei Nougami Neuro
Natsume Yuujinchou
Nabari no Ou
Pandora hearts
Rental magica
Rozen Maiden
Shiki
Shinrei Tantei Yakumo
Spiral
Suteki Tantei Labyrinth
Switch girl
Uragiri wa Boku no Namae wo Shitteiru
Vampire knight
Xxx Holic
Zombie Loan

It doesn't really matter if there's no romance as long as it has this kind of genre and the artwork is good enough and not too old looking. Can anyone suggest an anime or a manga themed as something like this list - a mystery / detective / horror / psychological / dark genre?