Chewiana Jones
Dunsparciologist
I would say... probably Reuniclus or Golurk. I really like both of them, design-wise, and unlike the big dragons and such, they won't require several pounds of raw meat per day, turn the sofa into a smoking pile of ashes, and eat the neighbors' dog. Reuniclus has the added bonus of being super-intelligent, telekinetic, and conveniently-sized, but Golurk can just fold up in a corner and hang out there without any food or water for as long as is needed, plus he's, you know, A GIANT FLYING ROBOT!!!