I'm assuming Eb is the minor 6th scale degree (at least in my example), so we're in F#. I'm using the foot pedal/left hand/right hand notation.
Coming from the 3 Bb/D Ab/Eb F# Bb Db (or even diminish if you want like B D F Ab B in the right),
I would do something like Eb/ Db F F# Bb / C# F Ab or .../.../C# F Bb or .../.../F F# C# F
The right hand really depends on the top melody note