Not really, he's not an A-list movie actor like Liam Neeson. And unlike Neeson (and like McDowell), he actually does have extensive voice acting experience.
But yeah, I expect many regular Bethesda actors to be there as well.
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.