Agreed. Saddest part is, I'm a huge fan of Patrick Stewart, but his performance as Emperor Uriel Septim was incredibly insipid and added absolutely nothing to the game--except for the intro trailer, which really should have opened, "Emperor's Log, Tamriel Date..." since that's rather what it sounded like. Sean Bean, as the only good voice actor in the game despite having a dull character, did add something though--one voice I didn't have to cringe at.
Besides, even if she's mostly done supporting roles, I wouldn't exactly call Courtenay Taylor "nobody," even if she's not as recognizable as Jennifer Hale or Troy Baker*.
*Though maybe it's just the games I play, but I only know him as Booker DeWitt and Kai Leng, so I'm not really getting the "Troy Baker steals all the lead roles" hate...I loved him as both DeWitt and Leng, personally.