Years ago, I was really into frontiersman rendezvous events and made a shirt by creating a pattern from scratch. It was more or less the one below. If I ever get a chance to get back into buckskinning, I think I would instead make something much more like the second picture. I'm inclined to practical usage these days rather than matching with any particular style.
As an aside, while I have no particular love of fringe, do be aware that it serves a purpose. These days it is mostly aesthetic, but in a working buckskin, it is actually doing a few things. The breaking up of the human form isn't useful outside of hunting, but the wicking away of moisture to aide in drying is another story entirely. Lots of extra surface area for drying it out after all.