I don't know what you mean by classical, but some other women composers are Ailbhe McDonagh, Angeline Bell, Anne Crosby, Catherine Rollin, Chee-Hwa Tan, Eugénie Rocherolle, Linda Niamath, Melody Bober, Nancy Telfer, Susan Griesdale.

*
... feeling like the pianist on the Titanic ...

I can recommend Cécile Chaminade who wrote many pieces for piano. And if you like Bartok, then maybe Galina Ustvolskaya who was a student of Shostakovitch.

    Sidokar WoW Ustvolskaya is so unique! I am listening to her 12 preludes now.

    I liked some of Elena Kats-Chernin's stuff someone showed me a while back. Don't have any specific pieces, but I thought I might throw the name out there in case someone is interested.

    AaronSF
    Add to the list Giselle Galos, a relatively obscure French composer of the early 20th Century known for "Le Lac de Come", a beautiful piece for piano solo.

    plop_symphony I too was going to recommend this book as well.

    Cécile Chaminade ( Sidokar ) and Germaine Tailleferre ( rsl12 ) are great examples. Staying in France you could also add Nadia Boulanger.

    I found this great video today on Cécile Chaminade:

    For American composers you could check out Florence Price and Margaret Bonds.

    a month later