this isn't really a ranking but
i think callie really loves it...she has experience and it's probably one of her favorite things to do especially if she can deepthroat. if you're big enough she might use her tits too...

shiver and frye would be really good at it too but shiver wouldn't do it as much because they probably don't shut up. you'd have to prove yourself somehow for them to do it. frye really likes 69ing and can eat someone out for hours

big man would be eager to please and loves getting feedback that someone likes what he's doing. that being said if you're not shiver or frye don't count on it happening

marie is pretty good at it because she prefers oral/hand work to penetrative sex. that being said whenever she's giving head she can be a huge tease about it

pearl's really good at it, but she prefers using a strap more, either giving or receiving. she's also a talker but unlike shiver she wouldn't drag it out and let talking get in the way of eating pussy

with encouragement from pearl marina will absolutely devour someone. the first time this happened pearl was completely caught off guard because no one's ever done that to her