Here is a great sounding high gain distortion/fuzz from Soulsonic.
Schematic and soundclips HERE
Initially I wasn't too impressed since the decay was really fizzy with lot's of crackle artefacts. After some tweaking I found out that if you replace D1 with a Shottky or a germanium diode the decay is way more solid and pleasant. It sustains for days now. I Also replaced the J Fet 10k Drain resistor with a trimmer to bias drain voltage to 4,5v. I settled on a 2N5457 here.
The tone control is very usable, ranging from dark doom tones counter clockwise to aggressive mids at noon to scooped metal tones fully clockwise.