Quick Transmigration Male Lead Novel Recommendations

This is not a danmei story. The male lead ends up with no one (there may or may not be romance along the way). It's a satisfying power fantasy, mainly about reforming scumbags.

I've started recommendations for female-lead quick transmigration stories and danmei quick transmigration stories. If you're interested, you can find them in my author collection.

Theme: A satisfying quick transmigration story with a male lead, not danmei.