It's impossible to list every puppet every made, because there are too many obscure, unnamed puppets used in the background, etc. However, MC does have a character guide planned for the future, that would take a slightly different slant than Kermitage, and would include characters outside the ones that appeared on The Muppet Show. It will take some time to be completed, though, especially since I keep wasting my time posting messages.
(See, I could be working on the character guide now, but I have more important things to do. So if you see me posting here, it very likely means I have more important things to do!)