The Zebra Midge is a classic and can be used in a variety of situations. It's not the sexiest of fly patterns, but it sure does pick up fish. It's great for stillwater fishing under a strike indicator or on the stream as part of a dropper team of flies.
Zebra Midge Fly Pattern
Hook: Straight eye curved shank CS49 or Firehole 315/316 #12-22
Bead: Silver brass or tungsten beads
Thread: Black 210d FWN or 140d UTC
Ribbing: Silver UTC wire (small)
Coating: Head Cement or UV resin like Bone Dry