Can someone recommend some good action mangas? No harem and little to no romance please! A...

http://www.mangago.me/read-manga/ranker_who_lives_a_second_time/
http://www.mangago.me/read-manga/revival_man/
http://www.mangago.me/read-manga/sekai_oni/
http://www.mangago.me/read-manga/the_hunter/
http://www.mangago.me/read-manga/other_world_warrior/
http://www.mangago.me/read-manga/terror_man/
http://www.mangago.me/read-manga/transfer_student_storm_bringer/
http://www.mangago.me/read-manga/the_breaker/
http://www.mangago.me/read-manga/kurogane_kezawa_haruto/
http://www.mangago.me/read-manga/beelzebub/
http://www.mangago.me/read-manga/nabari_no_ou/
http://www.mangago.me/read-manga/soul_cartel/

My hero academia
Yes I'm stupid

I really recommend "solo leveling"

Omg tysm! There’s a few I’ve already read but you listed ones I haven’t! i’ll be sure to check them out

I tried to pick some you might not have heard of. Let me know how u go x