Pedals that stack with the Boss BP-1

Fjord Fuzz Berserk

Run Fjord Fuzz Berserk into that transparent platform and it finally gets some fuzzy

Wren and Cuff Box of War Small Foot Fuzz

The transparent tone has headroom to spare — Wren and Cuff Box of War Small Foot Fuzz gives it high gain to fill it with

Electro-Harmonix Bad

Keep Electro-Harmonix Bad after Boss BP-1 in the signal chain, clear of Boss BP-1's own gain stage

Vox Valvenergy Silk Drive

Vox Valvenergy Silk Drive leans toward smooth, and that's a real, usable character to pair with

Mr. Black Bloodmoon

Keep Boss BP-1's transparent voice out front: Mr. Black Bloodmoon goes after Boss BP-1 in the signal chain so its dark voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

Red Witch Titan

Red Witch Titan's ambient voice goes after Boss BP-1 in the signal chain — it's not there to compete with Boss BP-1's own transparent character — goes in the amp's FX loop (or last, into a clean amp)