When considering "best" I would have to define it as a combination of both looks and beleivability. (performancewise not acting)
There are others that are close but none beat these two are IMO the best.
Good looks and you can tell they werent just going "ohh ahhh yes baby do it to me"
These chicks were INTO it.
Tops hands down is the Ivory Snow girl herself
Marilyn Chambers
A very close second place has to go to
The ultimate MILF. Nobody matched before or since the raw sensuality of
Kay Parker
Also neither have any silicon. I hate fake chests. I'd rather see or be with a chick that has small real ones then large fake ones anydayoftheweek.
The vast majority of todays stars dont even come close.
They may look good, and even better overall. but they loose points for silicon and beleiveability.