I recommend Eternally Regressing Knight. Interesting characters, smart mc, no romance, no sexual service, great action, good concept. It has both seriousness and comedy so I think it’s a good read. I also love that the mc isn’t dense. like when someone likes him, the mc knows. When there rumors about his love life, he knows. He just doesn’t care. Like
Some female: I like you!
Mc: I prefer fighting.
Some female: let’s fight like adults on bed!
Mc : not interested. But if you want to do actual dual, I’m ready any time.

i have evolved from reading historical isekai slops to now reading action regressor slops so to congratulate me being promoted i would like some recs that are not slop in that genre (something like s class hunter )