Favorite hero from Dungeon.

In campaigns, it's definitely Railag; for everything else, it's Lethos. I first encountered this guy in the "Challenge" scenario; he was my enemy and decimated half of my army before it even entered the battle. After that, I always hire him, and I don't regret it, as he's a powerful spellcaster.
True, necromancers don't care about his plague, but everyone else dies like flies.
And I also like Vaishan, and in the sixth part, Castor.