TheFanBoy
Hey, I don't know if it's villain enough for you, but there's a novel called "Can a scholar be called a villain" that is being translated by "puttytranslations". It's mainly about killing protagonists, but there's also a bunch of evil stuff too. There's also "the chronicle of the dungeon master of slaughter", but that one feels really strange to read, cause it's a japanese novel in a japanese style, yet not a fake villain like I heard "arifureta" was, the mc being very nonchalant with murder. Tho chapter translation and story are a bit slow.