Oddly enough, although I do not recognize the names of your ancestors, I also have been trying to track down my Cherokee heritage. I hit a dead end with my great grandfather, John Wesley Mosley, born 1869 and died 1957. I can't find his relatives. He died in Choctaw County, Alabama. I found a John Mosley who was registered as a Seminole, but once again, can't make the connection.
If anyone has any information, I'd love to hear from you. My email address is firstname.lastname@example.org