If you thinking of the original Tonto then looking for a mountain man in the right kind of get up might be the best approach.
Then you just need to do a head swap for an appropriate head.
Either that or a native in similar dress and add the fringing with GS.
In fact, looking at that picture above, any fella who has a similar face in trousers and a shirt would be a good start and just lengthen the shirt and add the other bits, fringing etc....