Thinking about it, I'll put a vote in for dragons as the Dwarves external opposite.
Dragons are creatures of the air while Dwarves are being of the earth. Their common link is fire. I don't remember the specific battle but I do remember that at one point a dragon (or maybe many) was giving a hard time to an army of Men and Elves. Then to save the day a force of Dwarves, wearing masks to make them proof against the dragon's fire, showed up and drove the wyrm back.
Actually the Dwarves and Dragons have alot in common. Both are immune/resistant to fire, both value great craftsmanship, both make it a goal to collect great treasure hoards, and both are rather greedy.
For the record, Dwarves rock...
