Hiace for reliability probably, but not very fashionable if such a thing bothers you.
Full size transit is just over 2m height, which is just a touch too tall for many multistory car parks and height restrictors, good choice if that doesn’t bother you.
Transit Custom, not sure they are down to that price yet.
Pugeot/Citroen Expert/Dispatch are cheap, but have their reliability problems, (I have one)
T5, probably out of your price range unless it’s a wreck.
T4 old.
Vivaro is good, think early ones had some gearbox and injector corrosion problems. Might be worth a bit of research to see what age that was cured.