The OP hopper in post #1 looks pretty much like the one I did best on in SW Wisconsin every September when the hopper fishing isn't for the faint of heat It's sort of like throwing hamburger to Piranhas.
The only difference with mine was I made the deerhair a bit lower on the sides to (allegedly) suggest legs.
I tried to gussy it up a bit by putting variegated rubber legs on each side and a thread segmented foam body and my takes immediately decreased by about 80%.
Sometime simpler isn't just easier, it's also better...