One that I like is the Arturia Beatstep. It does much more than that, but you could set the 16 pads to select any presets on the H9.  Then the knobs could be used to directly tweak any parameters on the H9. I know it says “Controller sequencer” but you don’t have to use it as a sequencer. Just configure all pads and knobs as controllers.

wow, that’s cool.  so the 16 buttons could be configured to launch your 16 favorite presets?

also , in the dumb question category, how would the Beatstep physically connect to the H9?