There have been so many, but only two come to mind.
Henchman Number 1 earned the title for his boundless enthusiasm and insatiable desire to please. It also led to a lethal workplace accident that I am legally bound not to discuss. He will be missed.
Old Whatshisname, one of our first employees, has been working here longer than I have. His sacrifice for science, made so many years ago, is still yielding valuable data to this very day. He no longer looks like this.