Hasek is one of the greatest goaltenders ever. Maybe top 3. And I'd say that had he never laced them up for the Wings.
I'd take Hasek in his prime over Roy or Brodeur in theirs. I can't speak intelligently about Dryden, Tretiak, or Sawchuk, but of my era, he was freakishly good.
Heck, at 43 he had a <2.1 gaa.