There was some interesting Kellhus discussion happening on another thread, so I decided to make a thread dedicated to the idea.
To me, what makes a character evil is if he's willing to do anything (or almost anything) including hurting others physically or emotionally to get him or herself ahead. A while back there was a book club on "The Company" by KJ Parker, and I called General Kuneissan evil. I thought, ultimately, he was going to get his island whether his friends liked it or not. He basically gave his friends no option but to go along with it, as he spent basically all their war money on setting it up. He had justified it to death in his head, but no matter how you slicing, he was stepping on all their toes and forcing them out of the lives they had built for themselves so they could fulfill his fantasy.
Kellhus is much more clear cut. He doesn't care who lives, who dies, who he betrays, as long as he gets where he wants to be. I don't see how one could see that as anything other than evil. 3rd I brought up the consult as evil, but truly, we don't know enough about them. Though, the fact that they almost destroyed the world with the No-God previously gives us a pretty good hint that they aren't quite Harry Potter.