The thing about Michelle Johnson is, that was the only mainstream film she did where she showed any skin.  The follow-on movies she did "protected her modesty".
I always thought Markie Post seemed a little too high-maintenance; all that hair and makeup prep work.  
Pam Dauber was pretty, but a little mousy.
Rebecca de Mornay never did much for me.  She looked too half-starved and had that big gap in her dentistry.
Erin Gray could never decide on a hair color.  Blonde in "Buck Rogers" tv show, brunette in everything else.  And she never really teased us with cleavage.  Not even a belly button.  What's up with that? 
 
 I'd have to say Phoebe Cates was at the top of the '80s sex kitten heap.  She was a natural beauty, with just the right blend of intellect, personality, great skin, clean teeth, dark eyes, and soft muscles.