I think elevator music gets a bad rap. Since our last car purchase, both of our cars have SiriusXM satellite radio. Included with the plan is the ability to stream audio from the net as well. So that's primarily what I've been listening to when it comes to music.
There is a lot of variety. Certainly more than you'd find on over-the-air radio. Being an ex-hard-rock-addict, I found myself listening to a few things that aren't good for me. So I started searching for stations on the service that were more morally neutral.
I've found a few stations that are ok. But so far the best neutral music I've found is the SiriusXM channel that plays elevator music! Totally harmless and not half bad. I think I'm getting old!
If I want to be completely purist about this, elevator music is NOT 100% harmless. Because when you listen to a song you know, even if it is an instrumental version... the words play in your head. However, most of the songs they play are songs I do not know. So it's probably about as good as it will get.