My experience with salmon is very limited, but after going through various gyrations and failed experiments to try and concoct a hot pattern nobody else was throwing, I came to the realization that those stupid simple “Alaskan guide” type patterns really do work best. They use them for a reason.
The fancy baitfish patterns I came up with looked cool, and the fish in the bays ate them, but when it comes to the fish in the river, super simple has always worked best for me. Ymmv