Zaltz, Slonimer,
Please look at my earlier posts, where I quoted undisputable proof that the original poskim ALL debated natural hair NOT synthetic. I.e. the Rema, Magen avrhom, Pri megadim, Sht”g and the opposing Be’er Sheva all speak about using your OWN hair.
The ones who permitted – permit all even if it looks exactly like hair I.e. your own hair. The ones who forbade forbid even synthetic and anything resembling hair.
There really is no third shita. Saying there is another concept of ‘wiggy” looking wigs is to a degree עם הארצות.