I like Mike Pence as well, but he has been very lukewarm about running and if he really wanted it, he'd be out there in the fray right now. Somebody who's willing to fight for it starting in the first round will be on my short list.
As I may have posted before, if this were back in the “old days,” when the candidate was chosen at the party convention, and the voting was deadlocked, Pence would have been the ideal dark horse candidate, emerging at, say, the 102nd ballot.