With the aforementioned BazzFuss, you can then experiment with
Joe Gore’s cap-blender “tone” mod;
EQD’s Bellows;
Dual BazzFuss (BuzzBox);
Add a Muff tone-stack&recovery;
Etc.
Another, good’n’ for experipermutations is the Electra variants. MANY from Lovepedal alone.
There’s a few SHO variants, too…
Madbean’s
SoulSonic’s Crackle NOT Okay
Paul @ DGP’s Oil Tanker
Etc
Then try some op-amp circs:
386 variants such as EQD Aztec Gold or whatever it’s called, Glass Jaw, H&G Amps’ OD, Grace OD, Big Daddy, Bass Boost, etc.
Then of course there’s all the hacked up Dist+/250/Ross variants to toy with…