Little to no romance
http://www.mangago.me/read-manga/god_of_blackfield/?cT7U
http://www.mangago.me/read-manga/chronicles_of_heavenly_demon/?R4o3
http://www.mangago.me/read-manga/the_tutorial_tower_of_the_advanced_player/?O7Tt
http://www.mangago.me/read-manga/limit_breaker/
http://www.mangago.me/read-manga/mashle_magic_and_muscles/
http://www.mangago.me/read-manga/murim_login/
http://www.mangago.me/read-manga/return_to_player/
http://www.mangago.me/read-manga/eleceed/
http://www.mangago.me/read-manga/the_undefeatable_swordsman/
http://www.mangago.me/read-manga/the_legendary_moonlight_sculptor/?KR0b
http://www.mangago.me/read-manga/sss_class_suicide_hunter/
(๑•ㅂ•)و✧
Unordinary- in the webtoon app its free!
And this one:
http://www.mangago.me/read-manga/mahouka_koukou_no_rettousei/?Nj0o
It even has an anime on netflix
Legend of the Northern Blade
something similar to http://www.mangago.me/read-manga/mercenary_enrollment/
http://www.mangago.me/read-manga/ranker_who_lives_a_second_time/
or http://www.mangago.me/read-manga/levelling_up_by_only_eating/?
preferably a little to no romance
and I'd like a similar artstyle (or at least, not ugly)