It is the over active throttle blade that is causing most of the RPM oscillations. I blew up both line graphs so you can see it better.
Throttle blade oscillation.jpg
You have to undo your prop table settings, make your spark tables a little more aggressive, and get the VVE dialed in so you're not idling in a ditch.
You need to lessen the throttle movement so your spark isn't chasing it around. Not sure how many different ways I can say it.