Duan Tianyou, You Are Like the Bright Moon

Classic Fantasy: A Sword-Cultivation Prodigy Who Is Neither Invincible nor Useless

Looking for books similar to "Sword of Coming". No System, genius-protagonist stories, please. I don't mind whether there's a female lead or a harem. I just want a genius swordsman who grows stronger and can hold their own anywhere, someone who has to use their brain so they're not ridiculously overpowered. Bonus if they have some faith and wield a sword.