Surprised by the preponderance of male authors being listed here. A few female authors, but mostly male.
My all time favorite author is Marion Zimmer Bradley. I know she had some personal issues, but her writing is amazing. Her characters are alive. She was tackling feminism from day one, decades ago, with Mists of Avalon, and her Renunciates on Darkover. She has also, as a personal mentorship mission, taken fledgling writers under her wing. in the end, it's her ability to transport me to new places that I love so.
I loved Joan Vinge for quite a long time. She had pages of 'wall of text' that described a single specific detail in such lush imagery that I simply stood in awe. Any time someone says 'avoid wall of text' I think of the rapture I felt at her walls of fully-realized text.
I've enjoyed Atwood and especially most recently her Robber Bride story as a great example of writing from three different 'strong' female viewpoints, each with a very, very different approach to life.
Sure, the male writers are good, and I 'grok' why we love them. I'm currently loving Matt Haig. A man. Amazing. Gender shouldn't enter into it--but to me it does, and frankly, the effort of female writers to 'do more' in their writing than to entertain is so, so valuable, so I'mma stick with Bradley, Atwood, and Vinge.