All Music's page on Third Stream albums: https://www.allmusic.com/style/third-stream-ma0000012292/albums
I have the Giuffre Ezz-thetics CD () on that page and am familiar with all of the MJQ's they list (although it seem those albums were included simply because they're MJQ albums and not necessarily 3rd stream).
I also have some albums from Ralph Towner (Solstice ) and Eberhard Weber (Silent Feet & Yellow Fields ) who are generally regarded as being 3rd Stream "influenced."
They're also listing Johnny Richards and I can see that. I've got the Mosaic Select and while I barely ever listen to it, there are pockets within tunes included there that I enjoy. I wouldn't call myself a 3rd stream aficionado or fan. More of a casual...