Kaitlyn Ashley. I love her. She did a BDSM recently, I forget the director. JUST as it was getting truly sexy - with all the babes about to do each other, the genius ends the film.
Gotta agree with the OP....Silvia Saint. My all time favorite. I don't think she can be dethroned in my opinion as the all time hottest. Just my opinion.
Allie Sin. She had the perfect girl next door look and nice natural boobs. The only thing that fucked it up image wise for her were those ugly ass tattoos on her arms. WTF was she thinking?