Pedals that stack with the Universal Audio Galaxy '74

Walrus Audio EB-10

Universal Audio Galaxy '74 leans toward modulated, and that's a real, usable character to pair with

Xotic RC Booster

What Xotic RC Booster brings here leans toward transparent — that's worth building a pairing around

Electro-Harmonix Holy Grail Max

Keep Universal Audio Galaxy '74's modulated voice out front: Electro-Harmonix Holy Grail Max goes after Universal Audio Galaxy '74 in the signal chain so its spring voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

Eventide Space

Put Eventide Space after Universal Audio Galaxy '74 in the signal chain, clear of Universal Audio Galaxy '74's own gain stage — goes in the amp's FX loop (or last, into a clean amp)