Action reccomendations (just no harem)

Savior complex ( zombie )
solo leveling
eleceed
berserk
chainsaw man
Vagabond

Brutal: https://www.mangago.zone/read-manga/brutal_satsujin_kansatsukan_no_kokuhaku/

https://www.mangago.zone/read-manga/efforts_never_betray/

https://www.mangago.zone/read-manga/parent_and_child/

https://www.mangago.zone/read-manga/stalker/

https://www.mangago.zone/read-manga/killer_dream/

i love brutal smmm