Which Orc hero do you prefer?

I usually play Haggeesh – because of her fast start, but I actually like Arghat the most. If she's available in the Tavern at the beginning, I use her to eliminate all the centaurs from Haggeesh's army and play with her instead. Arghat consistently levels up 2-3 levels higher than the other heroes of the Stronghold faction due to her quick acquisition of the Path of War and specialization. Of course, she takes bigger losses at the beginning than Haggeesh, but that's compensated for later...

By the way, there are people who prefer to play as Krag. This handsome guy can take down 6 Ents with his powerful attack at the end of the game... There's even a trick with the Mask of Justice, where a low-level Krag (level 1) with one high-initiative unit is sent against a high-level enemy hero.
Let's say the enemy's level is 20. Krag's level is 1. The Mask gives Krag an additional:

(20-1)*2 = 38 levels.

So, Krag becomes level 39. And he attacks first. You can imagine how much damage he can do with his attack to some dragons, after which he runs away from the battlefield...