Pedals that stack with the Keeley Compressor Good Ol'Edition

Beetronics Nectar

Run Beetronics Nectar into that transparent platform and it finally gets some low gain

Walrus Audio Eons

The transparent tone has headroom to spare — Walrus Audio Eons gives it low gain to fill it with

Neunaber Wet Mono Reverb Pedal

Run Neunaber Wet Mono Reverb Pedal after Keeley Compressor Good Ol'Edition in the signal chain, clear of Keeley Compressor Good Ol'Edition's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Meris Polymoon

Keep Keeley Compressor Good Ol'Edition's compressed voice out front: Meris Polymoon goes after Keeley Compressor Good Ol'Edition in the signal chain so its modulated voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)