Responses

The chronicle of demonic faction (murim)
The return of mad demon (murim)
Heavenly demon can't lives a normal life (murim reincarnated to period piece era transported to hunter modern korea era and return to period piece era) I know this sounds messy, but no, it's not.
Manga :
Kingdom
Modern era no romance :
The S Classes I raised
I actually have more but forgot the titles
Historical with no romance or harems pls <3