Another vote for the Cherokee, the newer the better. Reliable drivetrain (if a bit crude), 20MPG (hwy) is realistic in stock form. Tremendous aftermarket (and stock) support.
Having said that, if there is a surviving early '80's Cherokee with the 2.8L GM V-6 in it, run away...they came from the factory with a hole in the side of the block.
87-91's will have Renix engine management which isn't a bad thing, sensors and such are harder to find, the Mopar managed 4.0L HO is preferred by most.
The pressurized coolant overflow bottle (don't remember the years, 87-92ish if memory serves) is quite possibly the worst cooling system ever designed, not if, but when the plastic bottle is going to pop, easy enough to convert it to a more conventional system.
Leaking rear main seal is standard equipment on most any 4.0L, not that tough to change, 2 piece seal accessed through the oil pan, transmission doesn't have to be pulled.
Slight drivetrain mods over the years, mostly for the better. I'd look for a 92 or up with minimal modifications and good service records.
Good luck with whatever you decide, get out there and have some fun!