I am not well enough versed in the names of voice actors to pick an example, but I'm hoping for one (at least for a female elf, if they're having different ones based on species) that can sound more harsh and brusque.
This, of course, is the problem (well, one of the problems -- they are numerous) with having a voiced PC. Any voice picked will not fit with the character that a large number of people want to play. I do hope that at least we'll be able to tell what the voice is like in character creation -- I don't want to be surprised by realising that it won't work at all with the character concept. I'd rather know that ahead of time, if it's the case.
Because unvoiced protagonists are boring and non-emotional.
The Warden was a brick wall.
Unvoiced protagonists are precisely as boring or interesting as you make them. That's the great thing about roleplaying; you can play the character you want to play however you like.
Voiced protagonists often portray all the wrong emotions, tones, and speech patterns -- because it's limited to whatever interpretation the voice actor had of the character, which is highly unlikely to align with any given person's character. Yes, if you were able to choose not only how the voice sounded but also what inflection the character would use in any given sentence, it would be a great asset, but that ability is quite a ways away. As it stands, voice acting is a very good thing for NPCs, but a very limiting thing for PCs. It's fine for games with a preset character (which I would argue mostly fall outside of the category of roleplaying games), but a great handicap for those where you are making your own character.