Nissan NV is boring. And boring is good. It's outdated, but It will outrun the rest of those "modern" vans. Maintenance and/or repairs are a breeze with that access to everything in the engine compartment, unlike every other van mentioned. Parts are cheap too, and plentiful. But best part is - it won't need much unexpected parts or repairs, if basic maintenance is done in timely manner. Heck, even when neglected they run and run and run. Can't say the same about the rest. GM comes close, but Nissan holds the workhorse reliability crown here.
Just my last couple pennies here... ¯\_(ツ)_/¯