Personally Vladimir Kulich is the end-all be-all of voice acting in Skyrim, as he looks like an epic viking (13th Warrior, Ironclad) and sounds even more epic (I will gladly retire from the world...were such a day to dawn.)
Christopher plummer has a great voice.... when his mouth isnt full of spit
Lol, yeah. I still can't get over the fact that that one chick is the voice of Wirt the peg-legged boy in Diablo 1. That disturbed the feces out of me when I found out.