I think my favorite is Brenda Papadakis (Dear Jane). She was very helpful and fun. I took her class at Empty Spools. I wanted to go back for a repeat, but things came up and I couldn't get back.
I also like Freddie Moran and Becky Goldsmith, who I also met at Empty Spools - they are nice women (didn't get to take a class with either of them). Judy Neimeyer (had a class with her at a LQS and going for another) as well as Pam Clarke and Marilyn Badger (these are LA teachers that I have had).