Someone sent me a video of a Georges Bétemps exhibit which was on show during the 76th annual stamp exhibition of the North Toronto Stamp Club in Canada (it doesn't say which year).
The exhibit is put together by Daniel Marz and is a thing of beauty. There are quite a few frames and the material is presented very well indeed, so if nothing else it is a showcase in how to set up and present a collection based on a single engraver.
So yes, we've all got our work cut out! But in the meanwhile: enjoy the video.