I'm unsure whether he was well-known in real life, but he is famous on CDG since there are photos of both his cock and ass being played with. The photos also tend to resurface every few years.
I believe he was first posted in this
thread by ArNu, a CDG member and morgue worker who personally got to handle this Swiss hunk (his hand can be seen in the pictures posted above). Unfortunately it seemed he stopped posting when details provided in the original thread could be used to identify the Swiss guy, and therefore could be traced back to ArNu's morgue/workplace. Probably why nowadays new morgue sets can only be found in the Secret Room or Death Eaters group.
Here's an additional picture where the Swiss man's dead cock is being sucked: