I would think a small marabou jig would be very effective since that and a woolly bugger are very similar artificial baits.
I only started fishing micro jigs intentionally for cutthroat a couple of years ago and man, is it super effective
About the same time ago, I also started beading with my flyrod and an indicator during the fall months. I approached this technique with a high degree of confidence knowing that cutthroat were feeding on eggs and I was "matching the hatch". However in consecutive years and in different spots on the same system, the bead drew no interest at all. However, when I switched over to my ultralight spinning rod and micro jigs, I caught multiple cutthroat in the very same water that I had just beaded through. No doubt my beading/nymphing skills needed improvement, but I was super surprised how many cutthroat I fished over that ignored my egg imitation but were on the jig on the first cast. Now I always pack along my spinning rod and jigs to run through a piece of water after I flyfish it with streamers or eggs. Undoubtedly as I get better at ff'ing I won't need to bat clean up with jigs!
Good point about the similarities between a marabou jig and a wooly bugger. I have good success with a sparkle leech tied with pearl chenille but I rarely fish a wooly bugger. I think I'll try that more often...
This young VI angler fishes jigs a lot and catches large numbers of cutthroat. However, something that he does with good results, that I have yet to try, is fishing for trout in lakes with jigs.
https://www.youtube.com/channel/UCoaasjw_HzcjWOQLl9tI8kQ