Try this one:
Take a basic preacher progression, and use minor7th or minor9ths, instead of dominants. Your left hand will play a normal major chord, just a minor3rd above the bass, and you right will play the 9th, while holding whatever key you're in, just above it.
Key Ab:
FP\LH\RH
() - single note, not full chord.
Ab\(Gb)\Ab
C\Eb\DAb
Db\E\EbAb