The 1999 Toyota 4Runner SR5 4x4 (with automatic transmission) is simply the best stock SUV I have seen for off-road use. It is so light that it tends to skim across the surface of mud with the 4x4 engaged, rather than sinking like a Tahoe.
It is narrow, so it can make it through skinny trails.
It has high ground clearance and skid plates on key components, so it less likely to get damaged.
It has a relatively short wheel base (which combined with the high ground clearance and removing the running boards) means it is unlikely to get high centered anywhere, unlike a Suburban.
Any it is still very reliable after 115,000 miles.
-Reliability, simplicity and toughness at its best.
-Go anywhere vehicle.
-Low ceiling if purchased with sun roof.
Had to look hard for a 4x4 without a sunroof.