I'm Not That Kind Of Talent (action/fantasy! kinda sad though so if you're in a bad mood I do not recommend) https://www.mangago.me/read-manga/i_m_not_that_kind_of_talent/
Blood and Butterflies (action with a little smidgen of romance. also a lil sad)
https://www.mangago.me/read-manga/blood_and_butterflies/
I Stole the Number One Ranker's Soul (action/dungeon, FMC!! also includes some romance, but with one male lead)
https://www.mangago.me/read-manga/i_stole_the_number_one_ranker_s_soul/
The Returned C-Rank Tank Won't Die (action/dungeon, also FMC. I liked this one for a bit but admittedly dropped it recently as I didn't like the direction it was headed)
https://www.mangago.me/read-manga/the_returned_c_rank_tank_won_t_die_quantum_scans/

any good action manhwas preferably no harem