I agree, I think you can read it that way, especially after he pops back up after being shot at Cattle Corner Station.
You must admit though he has a pretty amazing recovery. Being shot period and getting up right away is a feat.
Hey.. Bet I could do it as well ICE
it's interesting to thinking about, to be sure, but from all the interviews he gave on OUATITW, Harmonica was clearly supposed to be a human being.