kamen rider-well this is obvious
guyver-not the main, but others around him
fighting
busou renkin-epic antagonist, no dark setting
World Embryo-main character
ubel blatt-main
Kurozuka-main
3x3 eyes-main
horror
Dawn Tsumetai Te-main
Variante-main
Kurozuka-main
Tomie-main
tragedy
blood+-her minions (esp the transformation of one of her family member)
gunslinger girl-main
misc
Ahiru no Oujisama-its a shoujo, but I really want to put this here
![biggrin](emoticons/beigebiggrin.gif)
narutaru-not really sure but i think there is some evidence of transformation near the end (dragon girl?)
Dorohedoro- main but the transformation was done before the story starts
sorry i didnt cross check with your lists but some of these should keep you busy for a while.