Typing without thinking, I guess we all do that.
Shinnok and Mallet are right. Man, that guy sure is good at slaying. I can't think of many fanfic characters who would be able to match that, not in that timespan anyway. Hmm, let's see. Simion (possessed Simion specifically.), Taillus (No comment here, that guy is just walking death.), Telina Delvanni (especially on a bad day.), any of Revan's dudes (Though they're not exactly TES.) and Ra'trith (Preferably non-werewolf.)
What got me hooked to this story is not the fighting prowess though, but the depiction of a less than perfect empire. Most of the time, the good guys are at the side of the Empire while the bad guys are out to do something bad to said Empire. Seeing it the other way around is an interesting change.