The strongest hero.

There are quite a few knight-necromancers. Ornella, Giovanni, Deidre, Lucretia – these are the most famous. Perhaps there are others.

Even the castle was built by architects who used to serve humans. The Gothic style of the Middle Ages is directly related to knighthood. Dead, but still knighthood :) There's no magic here at all. Although I've strayed from the topic, I've always been surprised that Necropolis castles look more like human castles than Academy castles.
Markel doesn't know when to stop. How would you rank the top 5 strongest heroes?