That'd seem to be the right idea. I see it as more of a supertag for all pictures depicting dead bodies, not just a catchall alternative for when tags like those two don't apply. This could be debated though.
Another question that comes to mind is, would we particularly care about tagging the deaths of nameless randos e.g. underlings as in
post #120924, or would this really just be for established characters? I could go either way here.