With all that in mind, there should be no limits at all on sunfish under 5", crappie under maybe 7", bass under maybe 10", and northerns/pickerel under 2 lbs in lakes where they're plentiful and stunted. If the bass population was culled hard enough so the remaining can grow, then a predator class would emerge for those larger stunted panfish.
Those lakes should get stocked with channel cats too. Channel cats will fill in that gap and take out that stunted group. Besides, who doesn't love a good catfish fillet? But there would have to be a way to get the cats big enough before they go in so they don't get eaten by the little bass and pickerel.