Holy shit! how did I missed this for so long?

Did you ever look for it? :-)

Other distros bundle TDE, not just Q4OS, but it is not a bad one and a quick way to try it.

Klassik is very new and as yet quite untested.

Me, I would like the original KDE fork used in Corel LinuxOS and later in Xandros Linux to be revived and modernised. For me that was the best KDE ever worked.

(The Bluecurve theme in Red Hat Linux -- before RH _Enterprise_ Linux -- was the best mainline KDE ever looked.)