I second on the Fairfield Barbershop. One of "cleanest" overdrive that I've owned. Everything just feels so natural coming out of that pedal.
My other choice would be Barefoot Queen Beest (latest Blueberry variant from them). Not as "clean" in my opinion as Barbershop but adds a nice low mid girth that helps in cutting through the mix.
My other choice would be Barefoot Queen Beest (latest Blueberry variant from them). Not as "clean" in my opinion as Barbershop but adds a nice low mid girth that helps in cutting through the mix.