This one is my favorite clean boost of all time and it is lifted from the obscure forgotten 3 knob Fender Blender. This rare bird had four tone settings; a great clean and poweful J FET based boost and three weak fuzz settings.
The 2N5925 FET might be a bit hard to source but a 2N5457 sounds identical to my damaged ears. And while the original had a 50k pot this layout has 100kA for even more boost.