Here is a complete guide on how to best the Ebony Warrior in The Elder Scrolls V: Skyrim. Unlike most NPCs, he has good gear, a myriad of perks, and even uses Shouts.
Regardless, the Ebony Warrior is one of Skyrim's toughest enemies.
Related: Skyrim: The Best Mods For Improving Combat There is almost no information about this NPC, what he's done, and why he is larger than every other human NPC in the game. This character will challenge any player that is level 80 or higher in hopes of clashing swords with a worthy opponent. The Ebony Warrior is one of the most infamous NPCs in Skyrim.