A jazz-harmony approach misses the point in a piece like this. Think more in terms of voice-leading and non-harmonic tones, specially the appogiatura and suspension.Tony Hyman wrote: eg .the progession from bar 6
to 8 ,my interpretation of those chords would be A13b9 to A7b9 to B11
to B7 to E. Wait there's more! bar 13 Bm7b5 to G#dim to F#m.Bar
23 B7b5 to E7 to A.