These are my favorite kinds of chambers.  Essentially:

• Simple and clean level design.
• Medium or hard puzzle
• Originality or unique concept
• Once you figure out the puzzle, it can be solved quickly
• Only a few test elements, but they're used very well

An example of this is Tangled Up In Blue by Elfarmerino
https://steamcommunity.com/sharedfiles/filedetails/?id=86391482

If you know of any more chambers like this, let me know.

 

You might want to try a map of SuperAiderton and me: https://steamcommunity.com/sharedfiles/filedetails/?id=2155115544

It fits your requirements perfectly