This is really a fantastic idea; reminds me of a modern version of those shareware CDs I used to buy in newsagents as a kid!
The main games I felt were "missing" were Commander Keen, Duke Nukem and Crystal Caves. I feel they are among the most iconic shareware games, after Doom and Wolf3D.
Vinyl Goddess From Mars
Jill of the Jungle
Is there a reason any of those could not be added besides personal preference? Just checking because I'll make a private patch that adds them for me if not! :)