Hey SJon, u see where U sub'd the A in the place of the D...I would keep it as a D because that's the sound I'm familiar with from most jazz pieces.
I would change the 2nd chord to a C bass with an EbM7 chord in the RH, so the 1st 3 chords might look thus:
G/A-Bb-D-F
C/(Eb)-G-Bb-D-(Eb) ()= can be omitted, but preferably play the EbM7 chord in root position for the g/sound
Eb/G-Bb-C-F
...