I joined before the Korthos quests were redone. Not all that early, but early enough to have that first narrator on the Korthos Island quests. He's probably my favorite male VA and I don't think I hear him much now that I am leveling more.
The other really good one and my personal favorite was the lady who did the Lordsmarch quests. I *think* she's the same one that does the Cannith challenge quests.
Maybe I am completely blind, but it's like they are anonymous. I can't find them anywhere. Either way, these two are my favorites and I wish I could have them for all of my quests. : )