One big help in attributing this rifle would be to get "standard" views of the gun, rather than the smaller, localized views of pieces of the gun. It is hard to really see the butt profile, amount of drop, etc. without seeing a larger "standard" half-shot of the front and back sides, showing complete rifle from butt plate out to about 10" past lock plate. The "standard" views show a lot more of the gun's stock architecture, which is a big help when trying to identify a rifle. A good view of the tang shape, and the guard taken from the bottom of the gun, would also help.
I also think the side facings with the oddly shaped, tapering tails really throw everyone off. They may be original, but I have never seen original side facings with that shape. If they have been re-shaped at some time, it would be helpful to know.
I have seen similar forestock double-line moldings that run through the barrel pins, and have the long, "wavy" termination behind the rear ramrod pipe, on central KY guns [detail probably carried to KY from NC], but other details don't appear to be from KY. Shelby Gallien