There's no telling what he might have accomplished, but he left US with some great ones including Bad Bad Leroy Brown; Time in a Bottle; Operator; I'll Have to Say I Love You in a Song, and more.
1) Bad Bad Leroy Brown
2) Operator (That's Not the Way It Feels)
3) Time in a Bottle
4) Which Way Are You Goin'
5) I'll Have to Say I Love You in a Song
6) The Way We Used to Be
7) Photographs and Memories
8) Age
9) Railroads and Riverboats
10) Roller Derby Queen