I would say Ally, Ana and Brittany in that order. Mistress Taylor and Sienna as well.

I've always been attracted to big firm bubble butts doing loud, bassy, squealing farts... My favorite girl in this category is Mary from Rottenonionz and Gassygirls.
Like Ally, she is also a kindergarten teacher with a great personality, sense of humor and doesn't show her face... And best of all, on some of her clips this girl can FART with the best of them! I haven't seem anything new from her lately. Hopefully we'll see more from her soon.