Garithos, maybe.
Of course, he lead the humnas in Lordaeron where there were no hope left, they fight against demons and undeads... He's a good leader, but not a good person.
You see, He rather trust The Forsaken better than the Blood Elves. He's a racist who, alone, destroyed a +/- 2.800 years-old alliance between Humans and Elves.
-Until he died.