For me mag hilux ka na lang. Nice ang engine, maganda ang tayo and easy to maintain.. Tipid din sa diesel..
Isuzu MUx MT hands down. Ride height and comfort over mild terrain, it's all there.
HiLux if only 4 or 5 to travel. Forget the sedan. Rough rider though. The new Nissan NP300 may be the best rider in the pickup class.
The base Crosswind is also tough for your intention, had the Revo been here, it's more preferable in 2L guise siempre. The Innova may not be best for constant road knocks as you described
What I can say is...Lets go back in the early, late 90's and early 2000's, This is when legendary AUVs of todays produced during that time. Those Tamaraw FX/Revo, Adventure, Crosswind. Those 3 are the most popular choices among that time and still glad that even up to now Adventure and Crosswind is still in production to cater those who are still opting for a conventional choices over those modern counterpart. Still, those said vehicles are really built to last. Proven and tested based on personal experience. To mention others choice from the late 2000's We can mention this Nissan Frontier and Urvan, Toyota Hilux, Mitsubishi L200,
We also had a Revo 1.8 gasoline, still 15 years and counting no major repairs on engine.7k-e engine it's just so so bulletproof...kung meron man mga minor lang and for preventive maintenance like clutch cylinder rubber kits, faded/clouding paint, replacement of brake pads/shoes.
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For modern day choices that you can keep for 15 years, I would prefer getting a MU-X or an Innova/Fortuner (Gasoline) I'm not still that much satisfied/convinced when it come to D4D technology of Toyota and parts like Turbo system and injectors is just so pricey when breakdown comes...oldest Innova d4d around here will already aged 10 y.o so let see in 5 or more years if there's still no major cost of repair on engine components then maybe I'll go.