You shouldn't even mention Metzen. The guy is a hack and a plaguerist. He does nothing but take the work of his underlings and claim all the credit for it. By the way, you're a moron if you think Jeff Strain only designed campaigns.
He designed the Warcraft 3/WOW engine as well as the multiplayer in WC3. He also created the basis of the WOW multiplayer code. I doubt that's even been improved since his departure.
This comment was edited on Jan 26, 08:39.