We have bought such furniture over the years from
http://ebay.ch . Ebay does not have extensive exposure in Switzerland, and the Swiss site does not operate in French. So there is little buyer competition and prices are good. There are a few German suppliers who offer new furniture, and various Swiss sellers at a loss on how to get rid of stuff which (in our experience) is invariably in good condition.
Then there is Emmaus, but their stuff is invariably tired.
Ouside of eBay and Ikea (which you've already rejected and which anyway doesn't meet your criteria) we found new furniture overpriced in Switzerland.