Nick Caserio is pretty much your rock star candidate, but there's some question as to how easily we could pull him away from the Patriots, especially since the Patriots organization is not overflowing with respect for Steve Ross or the way the Dolphins' orgnanization is set up. To me, the only way you're going to snag Caserio is basically giving him total control of everything top to bottom. That might not be attractive given that he's only 36 years old.
Russ Ball is a more conservative choice but as he's got very little scouting experience, he would essentially be a Team President type and would be hiring Director of Personnel to play a strong role in the scouting effort.
A guy I would consider strongly for that role under Ball would be Anthony Patch of the Philadelphia Eagles. He's got some ties to Miami in that he worked for the Dolphins prior to joining the Eagles in 2002. He was a well respected west scout before being promoted to Assistant Director of College Scouting in 2010, behind now-Colts GM Ryan Grigson. Patch continued to work as a scout in that role but helped draft guy slike Nate Allen, Kurt Coleman, Clay Harbor, Brian Rolle, Jason Kelce and Dion Lewis. His work helped get Grigson the promotion to Indianapolis as GM and he took over as Director of College Scouting for Grigson. Right away just in this first draft of his I'd say he effing hit it out of the park. Fletcher Cox, Mychal Kendricks, Nick Foles and Bryce Brown all look fantastic. Brandon Boykin looks pretty good as well. Not only that but their UDFA pickups have been great. Chris Polk made the team and actually looked good in preseason. They rave about Damaris Johnson. I don't know that Patch is strong enough a candidate to be the General Manager yet but if you had Russ Ball as a Team President then you could see about returning Patch to Miami as a Director of Personnel.