There are platy of them that focus on the detail. If you want the overall I totally recomend you this book (https://www.amazon.com/ASMR-Idiots-Guides-Julie-Young/dp/1615648186) it really helped me to understand WHY we feel the ASMR. Best of lucks :)
To add to this, while GW and HF are quite popular, WW does a loot of work beyond youtube. She wrote a book about ASMR with Julie Young called The Idiots Guide to ASMR.