Electro-Harmonix
Back in 1968, guitar amps were intentionally engineered to keep players from experimenting with distorted sounds. Electro-Harmonix changed all of that for the better and guitarists and musicians in general owe a debt to the brand and owner, Mike Matthews. EHX has been one of my favourite brands since I started playing ages ago. So many of my fav. vintage pedals were created by this fantastic and long-enduring company.
For 50 some odd years, EHX has been proud to contribute to many of the most famous recordings in music history. Their circuits won't ever constrain the color of your sound; rather, they give you the freedom to find it.