Here’s a proven pattern of the Rusty Brown Zebra Midge. Size 16 hook with copper tungsten bead and copper wire. UTC 140 Rusty Brown thread.
Very effective on Beaver Tailwaters as well as Norfork.
In early October I caught probably 15-20 trout in and hour on the Norfork with this fly. Over half of the fish were very large stockers that fought hard. They ended up bending the hook out, so I bent it back into shape and finally the hook broke a few fish later. It was great!!!!!