Dodge. But then again, I'm biased!
Ford would be my other choice.
This subject can have 100 different opinions. I agree that the Chevy (or GMC) is the best riding and most comfortable, but it depends exactly what you are looking far. I tow a 32ft 11,000lb boat/ trailer combo. My Dodge is a tank. I wouldn't trade it for anything, even a newer one. It dosent have the best ride but then again it's a truck, that what I bought it for. Not for a comfortable ride.
The main thing is, the newer diesels do not get great mileage like the older ones do. After '05 the MPGs went down on all of the diesels, thanks to the emission requirements.