Noblesse
Lookism
I don't know if they are action though. But they are really good.
black haze, the breaker, ares, warble, blood blade, Ranker Who Lives A Second Time, peerless dad, Dokugo (read the first one then second and third), Blood Rain S1/S2, Tong..
Choukakou (this is chinese manhua and the female is the main lead however art and story is really good. give it a try!)
i have more but i have forgotten many titles.
Don't know if you want yaoi but I really enjoyed http://www.mangago.zone/read-manga/penthouse_xxx/
It's lso hilarious af, I laughed out loud à couple of times
Korean action webcomic with good art and story. Ive read medical something, volcanic age, solo leveling, and scholr reincarnation. Anyone have something similar?