Hello!

Gul'dan is the only hero that doesn't have his own voice actor. He uses the death knight voice instead. Was a reason ever given for this?

Only the heroes from the Beyond the Dark Portal expansion have unique voice sets, and Gul'dan was from Tides of Darkness. Lothar, Uther, Cho'gall, and Zuljin are in the same boat.

Thanks for pointing that out. I didn't know that unique voices only came in the expansion. I just assumed it was there because I got the Battle.net edition in 2000, as opposed to buying each game separately.