A guide I know and trust had me and another fisherman field testing some of his new steelhead nymphs. They are money for sure. Sorry, no pics allowed, no descriptions. I can say that I spent a chunk of time tying up a load of them so that I'd have plenty the next outing.
I did not take the time to read this entire thread. Here is my input for any river in Wa.
Double beadhead body Golden Stonefly with rubber legs, Beaded Black Stone with rubber legs (has like 5% red and blue dubbing worked into the black dubbing), Beadhead Assassin, Copper Herniator.. I caught the most steelhead on those nymphs over the last few years. Clients caught the most too using them amongst the myriad of flies they tried while fishing with me.