This deserves more thought than I'm giving it, but off the top of my head my Top 10 would be:

1. "Take Me Home, Country Roads”

2. "Looking for Space"

3. “Rocky Mountain High”

4. “Calypso”

5. “Fly Away (w/ Olivia Newton-John)”

6. "Sunshine On My Shoulders"

7. “I’m Sorry"

8. "Poems, Prayers & Promises"

9. "Late Nite Radio"

10. "Love is Everywhere"

(You can see my fondness for the Windsong album)