After posting my question, I thought perhaps I should LIU, and I thought I recalled seeing "resurrection man" somewhere. Well, it turns out you need to get through a lot of "resurrection. Man..." references on the holy roller web sites, but I did find this in a discussion page on Dickens' A Tale of Two Cities, where the character Jerry Cruncher is described as a resurrection man, "someone who digs bodies out of their graves and sells them to science laboratories for dissection".

But I'll happily go with Faldage's Bartleby reference and use resurrectionist, especially if the esteemed Ogdred Weary uses that term.