I use 70'sGlamPiano (under RetroPop on your Genos)...
I don't know what the preset voices are on the Genos so...
Try Rock Piano (or Bight) for the first right voice, with a layer of synthesizer strings for the second right voice.
And then choose a 'spacy' synthesizer/choir voice for your left voice (something that is always moving when you hold the left down).
Have fun!