Here are mine (in no particular order)
1. Father and Son, Cat Stevens
2. The Pretender, Jackson Browne
3. Late for the Sky, Jackson Browne
4. Dark Side of the Moon (album that plays almost like on song), Pink Floyd
5. Dust in the Wind, Kansas
6. Puff the Magic Dragon (actually both a sad song and a meaningfull song if you listen to the words and don't keep thinking "little kid song"

, Peter, Paul and Mary
7. Freebird, Lynard Skynard
8. Changes, David Bowie
9. Lucky Man, Emerson Lake and Palmer
10. Desperado, The Eagles
There are many more that I could put up there, but those were some of the first that came to my head.