Chiyu Mahou no Machigatta Tsukaikata ~Senjou wo Kakeru Kaifuku Youin~ on NU. MC does not immediately become overpowered, but he does within a short time. To Be a Power in the Shadows! on NU. The Girl Who Bore the Flame Ring on NU.
Mahouka Koukou no Rettousei Re:Monster The Devil's Spice Kill no More Evil God Average These were off the top of my head. I don't try to keep a list of novels I read since I'm lazy. There's probably a search tag on NU that can help you.
My Wife is a Beautiful CEO Spiritual attainments of mingh hu Trafford trading club Death March Slime tensei https://www.novelupdates.com/series-finder/?sf=1&tgi=167,4971&mtgi=or&sort=srank&order=asc