Pedals that stack with the Cornerstone Overdrive

Klon KTR

The transparent tone has headroom to spare — Klon KTR gives it medium gain to fill it with

Browne Amplification Gritador

Run Browne Amplification Gritador into that transparent platform and it finally gets some mid-forward

Maestro Orbit

Run Maestro Orbit after Cornerstone Overdrive in the signal chain, clear of Cornerstone Overdrive's own gain stage

Xotic SP Compressor

What Xotic SP Compressor brings here leans toward mid-forward — that's worth building a pairing around

Wampler Catacombs

Keep Cornerstone Overdrive's transparent voice out front: Wampler Catacombs goes after Cornerstone Overdrive in the signal chain so its mid-forward voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

Malekko Electro-Harmonix Memory Toy Analog Delay

Keep Cornerstone Overdrive's transparent voice out front: Malekko Electro-Harmonix Memory Toy Analog Delay goes after Cornerstone Overdrive 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)