Second Gen V8. They came in RWD and AWD. Personally i'd look for a 1999-2001 RWD, as I never off-road and don't need to be on the road on the rare occasion we get snow in GA. The AWD is quite capable, but adds weight and complexity (plus dealing with the tires needing to be worn very evenly is a PITA and can get expensive if you need one or two and you end up needing to buy 4. The V8's can easily go 300-400 miles if maintained. I just saw a super clean, loaded 2000 V8 AWD Eddie Bauer in my area for $2300. It'll sell quick.
The OHV V6 engine is fairly reliable, but tends to suffer from cracked heads as they get older. Don't even consider the SOHC V6 if you looking for reliability. Both V6's use the same less-than-stellar auto transmissions, though there are manuals out there and both were available with RWD or 4WD in 2-doors and 4-doors.