Any one of the GMC/Ford/Ram heavy duty trucks I'm sure would do that you are asking of them.
Drive each one, and see how each of them feel.
As for the whole steel vs. aluminum bed thing, that's just worthless marketing right now. Aluminum may or may not be the cat's meow, but we won't really know how it will hold up for another 5-7 years of real world testing by customers.
As for dents in the bed, anybody can put a dent in the bed. If they really cared about the company equipment, the company would have at least put a half-inch plywood covering on the bed, or paid to have a bedliner put in.
Cheap way to avoid dents.
It pretty much shows that neither the owner nor the operator give a rat's behind about their equipment. Both are to blame, IMHO.