Here's a wonderful Jim Croce song that has to probably be explained to young listeners hearing it for the first time. Operator? "You can keep the dime"? What's all that about?
Let's see...well, we have to have the Bee Gees, and this is my all-time favorite Bee Gees song.
And then there's John Denver! I think there was a time when I didn't love John Denver. I think it was however much time elapsed between my birth and the first time I heard John Denver.
Ballads about 1970s events? We've got those, too:
And I'll leave off with this bit of pep by ELO, "Mr. Blue Sky".