User blog comment:VillainNut/PE Proposal: King Sombra from My Little Pony: Friendship is Magic/@comment-2059440-20200217221148/@comment-3070706-20200217221853

There's also Cosmos from FiM who is undoubtedly far more evil, but as she doesn't appear in the TV show, the comics were quite darker than the TV version. And Tirek did worse yes, but he cared about his grandma and nearly came close to redemption.