All reasonably well-known female readers to any serious fan of the genre:

Margaret Atwood
Kage Baker
Alex Bell
Marion Zimmer Bradley
Poppy Z. Brite
Lois McMaster Bujold
Octavia Butler
Pat Cadigan
Jaqueline Carey
Kristin Cashore
Trudie Canavan
CJ Cherryh
Storm Constantine
Leigh Eddings
Kate Elliott
Jaine Fenn
Maggie Furey
Diana Gabaldon
Mary Gentle
Barbara Hambly
Elizabeth Hand
Robin Hobb
Diana Wynne Jones
JV Jones
Nancy Kress
Ursula K. LeGuin
Doris Lessing
Katherine Kerr
Mercedes Lackey
Gail Z. Martin
Julian May
Anne McCaffrey
Elizabeth Moon
Andre Norton
KJ Parker
JK Rowling
Kristine Kathryn Rusch
Mary Shelley
Sheri S. Tepper
Lisa Tuttle
Michelle West
Liz Williams
Connie Willis
Janny Wurts
Jane Yolen