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Anna Kuramoto has done way more than just 2-3 DVDs that were not SCAT. A lot of her movies do not seem to give her credit. She has probably four from a company called "Cando". She also has done a movie for Gloryquest I believe.
She has also been in several movies released by Milky Princess, but they're so rare now it costs $150USD just to buy them used.
Adding to this list i'd mention Aoba Itoh. Maybe Minami Ogura and Anna Watase. Aoba has been in dozens of movies by now and has probably the smallest breasts of almost any AV star, for those that care.
Of course I like Konomi Futaba, but I don't know if she'd be in the skinny category.