Have not read this whole thread so not sure if these have been mentioned, but just wanted to shout out some favorite roasters who specialize in experimental processes -
USA
Hydrangea - CA
Brandywine - DE
Prodigal - CO
EU
Manhattan - Rotterdam
DAK - Amsterdam
People Possession - Paris
I drink mostly washed coffees, but coffee is my first love and I had a big phase with naturals and other processes. I like to keep a bag around for an afternoon treat. Anaerobics can be great for espresso too given they aren’t too funky to start.