I have thought about this a lot.
Both ends are haphazardly for me. The great idea about the ending of TGS was that it wasn't necessary, it wasn't foreseeable, it wasn't made for a message.
Silence could have shot down all the bounty hunters, like in all the other SWs, and it would have been still a great film, but not as special as the released version. Of course it had to be made better than in the lousy "alternative" ending included on the DVDs, without the surprise return of the Sheriff.
Corbucci could have used this idea already in Django, and he would have got the same effect (only that then there would have been no Django series, which wouldn't have been a great loss as all these films would have worked also without the Django tag).
The situation was similar hopeless for both with their crushed hands, but only in the real world.