I was gonna start with pornstar Janine Lindemulder but I'm gonna give her a break since its been 20 years and a couple kids since her first shoot with Penthouse (which I couldnt find at the moment). You can only battle nature so much. She definately still has the face to earn a fat contract with Vivid.
These will be good examples though some may argue about the pretty faces. If these girls had their nipples pushed any further to the sides they'd be in their armpits ! No wonder they stay NN.
The Taylor Twins
http://www.shockingteens.net/free/taylortwins002/shemp.html