Over G7(#9), you could play: G - B- D- F - A#.

The chord progression I'll provide is in the key of C minor, a common key for soul and R&B music due to its rich, emotional palette.

Cm7 - G7(#9) - Am7 - E7(#11) Cm7 - G7(#9) - Fmaj7(#11) - Cm7