Well I 100% agree with you. I use my retro pie as a controller only solution for the TV. I think a list of controller only compatible games for these systems is a great idea.
There are lots of fantastic games on the 8 bit and 16 bit computers that are never discovered by younger gamers or gamers in countries where the computers were not popular and everyone was on console instead. People avoid trying to emulate the old computers as lots of people play controller only.
By trial and error you can find games which don't need a keyboard. It would be great if more people played these games and discovered some of the many, many hidden gems on the 8 bit and 16 bit computers.