If you like musicals, the French soundtracks to Les Miserables and Notre Dame de Paris both have some fairly good songs, although you will probably have to buy them online.
The composer Francis Poulenc wrote quite a few secular chansons (I have them as a part of
this two-disc collection), but this is twentieth-century music and might or might not be to your taste (I actually like Poulenc's chamber music much better than the choral works I have heard).
From my own days in French class, I recall that Celine Dion sometimes sings in French; from looking at the song titles, the album "On Ne Change Pas" seems to be a collection of her French songs.
"The Dawnseeker" by Sleepthief has one song in French, "Entre Ciel et Mer," which is simply gorgeous. The other tracks on the CD are also good, but (unfortunately) sung in English.