Re: GAC/Pulp Hero/Villain names and a team name
Phantom Rider's a perfectly good one; it's just been copped by Marvel for their various (and failed, IMO) takes on the Western Ghost Rider. (I believe there's a Republic serial with that title as well) The Pale Rider works pretty well for a "resurrected" style Western hero, if you don't mind cribbing from the Eastwood film.
If he's more straightforward crimefighter than Weird Western, then something like The Masked Marshal, Spectral Sheriff, Haunted Hunter might do. You might also find something interesting based on the lore of the Indians that did the resurrecting. A phrase I recall from the poem "Hiawatha" was Black-Robed Chief, which I think referred to a Bishop.