Okay now that I know your preference I can make suggestions.
Fourth Prince's Debauchery(two warnings the MC starts as a pinnacle power so you won't see cultivation growth and it seems highly likely the MC is going to add his past life's murder/betrayer to the harem essentially because she regrets it, even though he gave her everything including her power and made her who she is, in which she later stabbed him in the heart after obtaining everything from him including his love).
The way of the Dao(again the MC has reached the pinnacle but in this one, his cultivation is sealed so he has to comprehend the Dao to unseal it).
Naked Sword Art(Definitely a good amount of smut, maybe more than you want, but the story is by o means lacking).
What do you mean my cute disciples are Yanderes?(The R-18 content is compiled into a separate entry called
"My Cute (Yandere) Disciples side stories" and if you start now you are lucky because the Diao Chan R-18 is out after a long time).
Sorry about the 4th prince rant, thinking that one potential issue still gets under my skin, but other than that I enjoy it. I also apologize if you don't like harem but for the most part, these are good harems, 4th prince has an issue with like 30+ girls but at least it isn't one of those cases where the MC has sex with them once or twice only for them to rarely if ever appear again. I consider harems where the girls only exist to sit on the MC's dick trash so I tried to avoid them, but if you want those I can give some.
Also, I recommend you avoid Immortal Only Accepts Female Disciples, MC lets his women beat him and verbally degrade him, while almost completely ignoring his own cultivation to help them on theirs(it takes over 200 chapters for him to advance for the first time in the entire novel). So unless you are looking for a Beta male simp MC avoid this.