One thread asked
DC-3 of the jet era?
but what might be consider the prop equivalent of the DC-3 in the modern era?
One might say the C-130 but let's put that aside for at least two reasons: 4 engines and one really needs BIG BUCKS (ie, the government) usually to have it. Let's think more in terms what someone could go to the bank to talk about.
Off hand, I would say the de Havilland Canada DHC-6 Twin Otter. Granted, it doesn't have it in range nor in speed or in cargo carrying weight ........
...............but it is a very versatile aircraft for a civilian operator for multiple type of fields, either on land or water.
Other suggestions?