You should check out Bethanne Graves Nemesh. She uses yarn and draws pictures on fabric with it. She has done some stunning couchwork, and she has videos showing how she does it. Here's one on her website, she also has some on her FB pages. One is called Bethanne Graves Nemesh, the other is White Arbor Quilting, Bethanne Nemesh.
https://www.whitearborquilting.com/featured-video/