Of those mentioned so far, the following were in the top 300 for 2010:
Michelle, Karen, Nicola, Laura, Ivy, Sarah, Samantha, Rachel, Jennifer, Tiffany, Kimberly, Maria, Julia, Mary, Martha.
So there are obviously plenty of those around.
Several more are still top 300 in the US (Andrea, Audrey, Caroline, Alison, Margaret, Josephine, Jacqueline, Claire, Hazel, Kelly etc)
Dorothy and Sylvia are often suggested on here.
I don't think there are many names that truly are not used any more.
My best attempt would be:
Fanny
Virginia
Gaye
Muriel
Edna
Gertrude
Sheila
Doris
Eunice
Freda
Yseult