The Herman Miller who fought Fay Keiser in June 1916 at Cumberland was Young Herman Miller, not his father. I would also bet my house that the Herman Miller who fought Jeff Smith, Billy Kramer, Henry Hauber, Mike Uraine, and KO Sweeney was Young Herman Miller. I realize that he was called Herman Miller by the newspapers but Young Herman Miller was often just called Herman Miller as well. I have his photo in the paper for the Keiser fight and its Young Herman Miller, not the elder.
There are two Harry Bakers on Boxrec that are actually the same person: The Harry KO Baker listed as being from Wilkes Barre was the same Harry Baker who was from Wilmington Delaware and fought out several locations such as Philadelphia, and Buffalo. Confusing the matter is that you have some fights attributed to one or both of those that actually belong to the Jewish fighter named Harry Baker who fought on the west coast but came east while Wilmington Harry Baker was active.