There are many answers to your question, but when it comes down to it, you are probably looking for someone who can network. Now I don't mean go hire the douche popular jock whose daddy has some fancy title at a 500 company. Instead look for someone who has the ability to make great connections. I would suggest going for someone who has (or is) graduating from a "top" school with a strong alumni network...but I have a feeling you already knew that. It sounds like you already know what you want/who has the best potential. Its just a matter of finding them. I would suggest making the interviewing process a little longer than usual.

PS It seems like I fit the mold quite well so here is my shameless solicitation.