Granny Weatherwax. I want to be her so badly when I grow up. All of Pratchett's women are pretty fantastic, actually.

I also love Ursula le Guin's female characters in a series called Annals of the Western Shore, which I'm not sure if you've read. They are fantastic.

And I love Shaz, from A2A, just because. She's brave and a little bit mousy at the same time and she loves Chris but still calls him out for being a dick.