Bernard.
As for the question in the OP: Shelly, without a doubt. One of the sexiest scenes I’ve ever seen on TV was the one in which she (while unable to speak normally) sang the ballad of “The Lady and the Snake” Take me in, tender woman/ Take me in for goodness’ sake … (After the serpent bites the trusting lass) You knew that I was a snake/ Before you took me in!
By the way, Cynthia Geary was a voice major at the University of Mississippi, and took advantage of her musical talent for that episode. Cite can be found toward the bottom of this Northern Exposure FAQ.