Nowaru

Before that, he wiped out the entire top squad of Death Knights.

And exploded from the impact with an accuracy three to four times less than his evasion...

In reality, Ivor only eliminated two or three Harbingers. Oren, Narya, Iliel, Magnus, and Mahus died in other ways. Gor's death is also only partially Ivor's achievement.

I think that if it weren't for Ivor, we would have had completely different tactics and would have likely lost a maximum of one or two people in total.