Best examples (Ones in bold are the best of the best examples) -
Kage no Jitsuryokusha ni Naritakute
Shinju no Nectar
The Reincarnation Magician of the Inferior Eyes
Ore Dake Haireru Kakushi Dungeon: Kossori Kitaete Sekai Saikyou
Parallel Paradise (I mean.. he is kinda overpowered, isn't he? He...