I'm in the midst of testing out the Blackstone MOSFET overdrive. That I will review and post later... the way it interacts with your playing is tremendous.
Btw, you are mostly right to say OD/Dist/Fuzz, there is only so much to the way they sound, but the real differences are when you play with the pedal and the way it handles your playing. Thats why I have been searching for drive pedals because I want a peculiar way of interaction: little compression, no bloom, dynamic.