Those are fantastic paint jobs. I'm working on a set myself at the moment. The only Dwarf I would say of being in danger of being too tall is Dwalin, who stands just under man-height. That said, I think the implication is just that he is a seriously giant dwarf. The heights of the Dwarves very a lot, but no more so than the heights of humans, and they all look pretty broad when put next to a human.
They are great minis, the most detailed plastics I've ever seen, and your paint jobs really bring that out.
Amazing conversion work on that troll, too.