I'm trying to improvise something based on this video lesson which uses part of the Ab Major Scale and the chords Bbm7, Eb7 and Abmaj7.

What other jazz-sounding chords could i use?

I know Em7 (x79787), A7 (575655), Dmaj7 (x57675) and Gmaj7 (3x443x)... would any of these work?
Eb ninth? theres probably more but to be honest im not very good at working this kind of thing out yet.