Searching for Ancestors of Joseph Harvey Mutter

Joseph was born 1938 in Coeburn Wise Co Va.His parents were Arthur Mutter and Flossie Elzina Comer.Some family names include Hart-Sizemore-Blevins I beleive that Joseph has an Indian lineage I can trace it back with almost certainty.I am looking for any information to help set this as a fact.Someone who is related and has traced this family would be a great find.I can traced Joseph's line back to
Ned Sizemore and Cheif Bear Hart aka William Jackson.