For canned salmon, I’ve been getting Wild for Salmon, a small family owned Alaska/Pennsylvania company. They mostly do sockeye, also available as frozen and smoked but also have other products. We discovered them at farmers’ markets in eastern PA but they also do online sales. Well, at least until the EPA allows Pebble Mine to destroy the fisheries.
After reading a few sustainability rankings for sardines and tuna, I get Wild Planet which is in many supermarkets.