Without a doubt it's Hillary Scott, insanely hot, amazing performer, 520 movies, out of all the girls I have scenes of, the only one to have more is Jenna Haze and only by 8 and Jenna started 3 years before and is probably the most popular porn star ever (discounting mainstream popularity (Jenna Jameson <-undeserving, Ron Jeremy etc...) Some of her numbers compared to some of the most popular porn stars: more than 50 more anal scenes alone than Lisa Ann has scenes altogether, more scenes in which she swallows than Priya Rai has scenes altogether, more than twice as many IR scenes as Eva Angelina, (I can't even believe this one) just 3 less double anal scenes than Abella Anderson has scenes altogether 15 vs 18 (yeah Abella is pretty new but it's fucking DA for Christ's sake), 40 more DPs than Aletta Ocean, 6 anal scene with Shane Diesel (2 of which were DPs :O) It takes Mika Tan, Gianna Michaels, Daisy Marie, Tori Black, Carmella Bing, Asa Akira, Belladonna and Tory Lane's combined scenes to have one more cream pie than her. I could go on and on is basically what I'm saying with her.
Leah Luv, Hillary's tag team partner (10 movies together) and basically like her little sister as far as the amount of scenes and what she has done in them. Also, braces
Francesca Le, IAFD has her listed as starting in 92 and she's still crazy hot, even FOs underrates her T_T by having her a pending OSCM for like fucking ever. Like the two above she is also an astounding performer.
Jasmine Byrne as well, she is quite popular but still atrociously underrated. She has everything, she is an incredible performer, will do any kind of scene, has a ton of scenes, has worked with so many people and is probably the overall most beautiful porn star I've ever seen (she is without a doubt the hottest all natural porn star) In my opinion she is the best porn star there is, even edging out Jenna Haze.
Others include: Vanessa Leon, Kat, Catalina Taylor, Renae Cruz, Priva, and maybe Tyra Moore (she wasn't that good of a performer but she's hot as hell) The problem in this thread is that you kinda gotta know what others think or at least general opinions of certain girls cuz some girls get no attention not because people know about them and don't like them but because they don't know they exist to begin with. If girls like that count then: Julia Paes, Bella Marie Wolf, Cassie Cruz, Chavon Taylor, Joyce Oliveira, Loona Lux, Lorena Sanchez, Taylor Layne and Leah Jaye.