Who is the Strongest Enemy in Skyrim

Most characters and enemies level with you, although only up to a point. Other enemies actually have and maintain their levels regardless of how powerful you are. So with all of these things in mind, who is the strongest you can find in this game? I have compiled 3 different lists to answer this question. The first one is a list of the strongest non uniques non dragon leveled enemies you can find. This list is not literal, as a lot of vampires would be stronger than even the strongest bandits. So i tried t