Manhwa recommendations

Villain-ish MC
> Brutal: Satsujin Kansatsukan no Kokuhaku
http://www.mangago.zone/read-manga/brutal_satsujin_kansatsukan_no_kokuhaku/
> Pumpkin Night 
http://www.mangago.zone/read-manga/pumpkin_night/
> Villain Intialization
  http://www.mangago.zone/read-manga/villain_initialization/
> Prison Lab
  http://www.mangago.zone/read-manga/prison_lab/
> Jinrou Game - Beast Side 
http://www.mangago.zone/read-manga/jinrou_game_beast_side/
(sequel of jinrou game)
> Jinrou Game: Crazy Fox 
http://www.mangago.zone/read-manga/jinrou_game_crazy_fox/
(also in the jinrou game series)
> Fukushuu Kyoushitsu
  http://www.mangago.zone/read-manga/fukushuu_kyoushitsu/
> Kami sama, Ki sama O Koroshitai.
  http://www.mangago.zone/read-manga/kami_sama_ki_sama_o_koroshitai/?wxlZ
> Death Note
  http://www.mangago.zone/read-manga/death_note/
> Funouhan
http://www.mangago.zone/read-manga/funouhan/
> Homunculus
  http://www.mangago.zone/read-manga/homunculus/
(not really a villainous guy, but he ain't a hero either)
> Yuukoku no Moriarty
http://www.mangago.zone/read-manga/yuukoku_no_moriarty/
(i think its gonna get an anime/has an anime)
> Unhinged 
http://www.mangago.zone/read-manga/unhinged/

HOPE THIS HELPED