I think "Ode to Billie Joe" is one of the best songs ever written.
I love singing it. I adore the 7th chords that run through the whole thing -- the perfect complement to Bobbie Gentry's lyrics that tell a story filled with unresolved details.
An article in Performing Songwriter magazine tells a bit about what became of Gentry and The Story Behind the Song
And Bobbie Gentry singing it oh-so nicely: