Sorry to disagree but the body of a dead person is just that, a body, or more properly, a carcase. It contains no intelligence and all that once makes it human is gone and lost. As a piece of "off" meat, why bot make some use of it. Anything else is just a waste. As for the corpses consent, the dead have no rights, noe can they give consent. This should be as obvious as trying to ask a steak or pork chop for permission to eat it. The original animal was, like us, an intelligent entity but is now only fit for food or waste.
Shaffir to Herzog: Opposition failed to show leadership in political battles against PM (Haaretz)
from the article: The Bodies exhibition is coming to Israel, and it's an ethical travesty