Sorry, Chandler, AZ police win the prize.
A few months ago I stopped at a traffic light (red). A cop pulled up behind me, turned on his lights, went around me in the left-hand-turn-only lane, went through the red light, turned off his lights, and continued on with the rest of the traffic.
Apparently laws don't apply universally here.
Recently a woman pedestrian was injured when a cycle cop ran her down. The street was closed to traffic for a town event, and the pedestrian got hit as she stepped off the sidewalk. Let me reiterate--a pedestrian was hit by a cycle cop on a street that was
closed to traffic.
Now, as for the Maricopa County Sherriff, they've got my vote. We're in an unincorporated area and a deputy cruises by through the neighborhood every day to give things a once-over. He is particularly fond of our dog.

I've even seen them pull over people who are driving recklessly! What a concept!