Rose the Hat was a female ripoff of Fields of the Nephilim singer Carl McCoy
80s-90s Goth Rock singer, Carl McCoy: https://preview.redd.it/e99vgxllvap01.jpg?auto=webp&s=2b790397bb24114b140b5a7e1afda6d7c3bfc9c5
Rose the Hat: https://static.wikia.nocookie.net/stephenking/images/8/86/Rosethehat.jpeg/revision/latest?cb=20191120022359
Rose looks a lot cleaner and her hat is smaller, but she obviously is a pure ripoff of McCoy right down to the little braids in the hairstyle.
In the book, The True Knot seemed much more subtle, like the kind of people you see at rest stops and campgrounds in their RVs. I guess the costume department didn't find that glamorous enough.