It's hard to pick only one, because I like particular screams for different reasons.
Julia's scream is so over-the-top and raspy, like a goat in hysterics. Nervous breakdown city! LOVE it!
Maggie certainly gives it her all, and she can look the most genuinely petrified of all the female screamers. She's the one you really want to comfort when you see her screaming (well, Gerard and Ringo would want to comfort her, for sure
).
Naomi has the most "refined" and ladylike scream (if one exists). I especially enjoyed how she screamed in her dream when she pulled the wooden arm off that department store mannequin she caught Jeremiah kissing
Barnabas is a competent screamer, but in 1795, how does he do it so convincingly with that bat-on-a-wire?
While we're on the topic of screams, I do have a question ... why was a pre-recorded scream by someone else substituted for an actor's scream from time to time? In 1967, when Maggie dreamed she saw herself in a coffin, she shrieked, but I don't think it was her voice. This same shriek was used for Vicki at some point during the dream curse, and perhaps for other female characters on other occasions. What was the deal??
Ben