Here is what would happen if pure evil villains are mind controlled to become good.
William Afton: Programs the funtimes animatronics to protect children. he also hunts down other serial killers.
The Ink Demon: Is passive to good people but hunts down anyone that is a really bad sinner.
Absolute Solver: Spends of the time as Cyn serving humans but will sometimes turn into a eldritch abomination to fight off world ending threats.
Light Yagami: Is no longer a sadist and only uses the death note when it is justified.
Pumpkin Rabbit: Gives out Candy and gives out safety tips to kids on halloween.
Pennywise: Shapeshifts into what people like the most to entertain them.
Judge Holden: Convinces people to work together and redeem bad people with his words.
Qu: Would genetically modified humans to become superior beings instead of inferior ones.
AM: Serves as the world's security, protecting the world from threats. He also no longer holds any hatred to humanity.