Hoagy Carmichael - Heart and Soul

This big band version, which is also from 1938 like the Larry Clinton, does use less straightforward triadic harmony, more what we would call 'jazz harmony' today (being careful bc I'm sure the Larry Clinton was also called "jazz" in 1938): https://www.youtube.com/watch?v=NjBks71fQ70

Like the Bandits version upthread, interestingly, the chord progression is I-vi-ii-V instead of I-vi-IV-V, which does make the song more interesting imo since the melody then moves from the minor seventh to the fifth over ii rather than from the fifth to the third over IV. But this version also fills out the harmony, with I think a sixth over the I and at least diatonic sevenths over the other chords; obv some chromatic improvisation too.

The Bud Powell version is good!

Dying to click on it when I have time/InWalkedRedd

The third chord in the Bach example on the wiki page should be analysed as ii[6/5] imo. The Mozart example comes p close to what the student piano H&S does!

The Goodman dong

*song suggests H&S was already known as a piano duet in the early 70s. I still don't know where that came from. Was it included in a popular instructional book?