1faint

Like Harada....thats HARD ;)
Lots of twisted are just stupidly twisted...
Do you know NAKAMURA Asumiko?
For wirldly twisted MOTONI Modoru (Dog stye is quite normal try Tetsu x Rika)
KUNIEDA Saika has some good twisted ones and great light comedies try Bannin or really nicely twisted Haru ni Kaeru

http://www.mangago.zone/home/mangalist/60089/

http://www.mangago.zone/read-manga/100_perfect_girl/ (seems fluffy in the beginning but gets really dark! but it's not twisted ^^)

http://www.mangago.zone/read-manga/umineko_no_naku_koro_ni_chiru_episode_7_requiem_of_the_golden_witch/ (twisted)

http://www.mangago.zone/read-manga/deep_love_reina_no_unmei/ m (twisted emotionally and the other Deep Love books will make you cry)

http://www.mangago.zone/read-manga/happiness_oshimi_shuzo/

http://www.mangago.zone/read-manga/revenge_game/

http://www.mangago.zone/read-manga/puzzle_morie_satoshi/

I don't know whether this is twisted or not, but this is one of my favourite http://www.mangago.zone/read-manga/enka_zetsurin_ou_to_yokubou_ouji/

You can check my list http://www.mangago.zone/home/mangalist/110286/
Not everything is yaoi but it's twisted, especially this one is my fav
http://www.mangago.zone/home/mangalist/110286/
You can also check Ogawa Chise's works

Sorry wrong link. I mean this is my fav
http://www.mangago.zone/read-manga/ibitsu_no_kakera/

http://www.mangago.zone/home/mangalist/60089/ some of my favs. as pedangrajaarthur said check out ogawa chise's and some of Psyche Delico's works