I get most of my CC from my tumbler feed where I follow a few simblr's that showcase CC from a lot of different creators...as such I honestly don't know that I have favorites for most of the CC types that I use.
A few names do stand out in terms of how much of their CC I have compared to others:
Ravasheen and Joolster for BB stuff
RenoraSims for clothing
Cripticsim for makeup
Madlin for shoes....I don't have any footwear CC that isn't hers.
For all other CC categories there aren't any standouts. Just a lot of different creators.