Rusty Gates marries a Hairwing dun to a Stimulator. Another fly that could serve, with a few changes, for any of the plus-sized drakes.
hook - TMC 5212 #6
thread/rib - UTC 140 hopper yellow
tail - moose body hair
shuck - Congo Hair brown
body - deer hair
body hackle - grizzly (undersize by 2)
front hackle - brown/grizzly mix
wing - deer hair
Part 1
mash barb, start thread at 2/3 mark, wrap back to point above barb
clean, stack, measure (hook length) some moose body fibers; tie in, trim
tie in a sparse hank of CH
clean, stack, measure (tips should extend gap width past the barb) a clump of deer hair
2 soft loops, slowly apply/release/apply tension and let the hair surround the hook shank
trim butts, then tie in hackle
spiral rib to the bend, then a couple tight wraps to flare the tips