Geri plays a bit like Cecil Taylor on the two Ornette Coleman albums (Sound Museum: Three Women & Hidden Man). To me, the two albums sound very similar but its all great music.
I'm currently on a quest to get as many of her recordings as possible, even if she plays just a few bars on one song. This discography website is a great resource.
Next target will be the Classic Ellington disc with a symphony orchestra and Lena Horne on vocals.