This always bugged me. I mean, I'm no expert but if they do VO for multiple characters, and use the exact same voice (their "default" voice, if you will) for all of them, can we still call them voice actors (i.e. are they really earning their pay)?
Yeah the same couple of monotone people who do the voices for most of the generic characters. At least change their accent to make it sound like character A was not voiced by the same person who voiced character B.
I'll just point out that there's a quest in Oblivion where Wes Johnson plays all three npcs involved in the quest. There's a point near the end, where al three npcs will be talking with you and to each other at the same time. So basically, that's Wes Johnson having a three way convo with himself. He pulls off making all three voices slightly different quite well.
Blame Bethesda for putting him in that dumb a situation by not hiring a handful of additonal voice actors to provide some variety.