First, stalk this lovely dear cuz she'll have precisely what you need in her lists.
http://www.mangago.zone/home/people/238/home/
Then, have some of my personal recommendations, tho most are pretty long series (≧∀≦) (You'll probs have read all of them)
http://www.mangago.zone/read-manga/berserk/
http://www.mangago.zone/read-manga/parasite/
http://www.mangago.zone/read-manga/gyo/
http://www.mangago.zone/read-manga/battle_royale/
http://www.mangago.zone/read-manga/murcielago/
http://www.mangago.zone/read-manga/shigurui/
Actually, I haven't read most of these yet :3 thank you for recommending these! I will surely read them ^_^ and also check out this user's lists ლ(´ڡ`ლ)
I wanna read some really guro manga. Doesn't matter what the art looks like, just needs a good story and action. I've already read the popular ones like Ajin, TG, etc. Thanks in advance to anyone who recommend ლ(´ڡ`ლ)