WLS in the early 70's was "good time rock and roll".
We had lots of items like "color radio" on KFWB, KEWB, KDWB, WHK and others. Boss Radio on KHJ and some of the Drake consulted stations. Hot Hits on the Mike Joseph consulted ones. "Superstars" on the Abrams client FMs.
Many of the 60's and 70's Beautiful Music stations did adaptations of call letters, like ""Cable" for KABL in San Francisco and "Coast" for KOST in LA and plenty of calls with "EZ" in them that became "Easy 107" or the like. A review of station ads in Broadcasting at
https://worldradiohistory.com/Broadcasting-Magazine.htm and in other trades like Sponsor and Television / Radio Age will show even more.
Internationally we find language issues, unless we restrict ourselves to slogans used in the US, Canada, the UK and Australia / NZ (other English speaking nations, such as South Africa, much of India, Jamaica, etc. did not have private commercial radio until relatively recently.