My city still uses mainly uses the crown victoria as the marked vehicle. We are starting to get taurus and we've always had the tahoe. Most of the cities tahoe's are unmarked. Then again my city uses almost any vehicle like I've seen: Chargers, Toyota Camry, Multiple Jeeps, Older Ford Taurus, a Buick/Mercury, and other vehicles rolling on the street unmarked.
Sheriff uses Chargers, Tahoe, and Crown Vic and same for the State Troopers.