Jeep (Chrysler) makes great towable vehicles. Wranglers (after 2009) are ready to hook up with only a front hitch added on (no messing with drive train disconnects, steering locks, etc).
Grand Cherokees are also towable on all 4 wheels, but you have to pick the correct options. Not all 4x4 are towable, you need need the right options. The other thing to keep in mind is that a Grand Cherokee is HEAVY. Its not just towing capacity, but consider how the tail will wag the dog as you go down the highway.