I feel like this list could definitely benefit from more women!

The Parable of the Sower by Octavia Butler

The Color Purple by Alice Walker

A Wizard of Earthsea by Ursula K Le Guin

North and South by Elizabeth Gaskell

The Complete Poems of Emily Dickinson

The Enchanted April by Elizabeth von Arnim

Their Eyes Were Watching God by Zora Neale Hurston

A Good Man is Hard to Find and Other Stories by Flannery O'Connor

Wide Sargasso Sea by Jean Rhys, but only after you read Jane Eyre

Beloved by Toni Morrison

The Handmaid's Tale by Margaret Atwood

Sister Outsider by Audre Lorde

A Thousand Mornings by Mary Oliver

I hope at least a few of these will interest you!