I've seen a few Mia Rose scenes. Whenever she is with a big guy she really gets off and doesn't stop cumming. E.g. her scenes with Chris Charming, Manuel Ferrera, Erik Everhard and Mark Ashley.
I know that most female orgasms in porn are fake, but her reactions seem pretty genuine to me, and doesn't have any annoying theatrics or screaming. And I like watching girls who get off on being fucked hard and deep.
Taylor Hayes, so much so she used to humiliate her costars who rocked anything less than a baby arm.
Bree Olsen, though its a toss up who overacts more her or wild man charlie
Krystal Steal: With the smaller kind you will get the , uhh yeah, uhh yeah, uhh yeah, with those a little bigger, its still uhh yeah but the tone is above that of a heart monitor of a coma patient.