Allen West has often been proposed. He brings military and Congressional political experience to the table.
Trump has already used Governor Chris Christie, so he may be a likely choice from Trump’s point of view.
Whoever it is to be is usually a current or former Vice President, Governor, Lt. Governor, Senator, Congressman, Cabinet Officer, or Army General officer G-4 or G-5.
He would be an interesting pick. I remember contributing to his campaign, even though he wasn't from my state.