Right now I would say the best looking one for me is Agatha Vega, she is all natural and could very easily be a fashion model.
I loved Harley Dean, but all that plastic surgery has really hurt her beauty.
Little Caprice still looks gorgeous after 15 years
Dani Daniels, although not that pretty (nose I think) still has such an amazing natural beauty... those eyes and that ass!!
The face of Desert Rose/Cody was to die for
Another gorgeous pornstar for years would be Sophie Sweet
Others that are truly pretty:
Jenni Lee
Dani Jensen
Michelle Anderson