I keep going back to Foundy recently. Great quality, with a roast level that suits me, and top notch service. A few months back they had a batch that was not optimally roasted and wrote to people who might have been affected offering to replace it - frankly the roast was still a 7/10 and I reckon most roasters wouldn’t have been that honest so they’ve got my loyalty. I have a bag of Rocko Mountain coming from them tomorrow.
Thumbs up for Cartwheel and Square Mile too, and I keep meaning to try Assembly for espresso but so far have only used them for pour over (and liked it a lot).