Over the years I have owned a myriad of cars SUV's and trucks.

Like a couple of others here, I can vouch for the Jeep Cherokee XJ model. IMO, these are about the best all around and off road SUV style vehicles out there. And as Greg mentioned, there were millions of these made and the 4.0L HO, straight 6 engine (not V6) is legendary for it's longevity and ease of use to work on.

The 1997 Cherokee I had was equipped with the 4.0L HO engine, a 5 speed manual transmission, a 8.25" Chrysler limited slip real differential with 3.73 gearing. For a factory stock vehicle, it was very, very capable offroad. Also as Greg mentioned, there is a ton of aftermarket parts available for the XJ's. To this day, I kick myself for ever selling this vehicle...