Locker - doubtful. He has always been inconsistent and injury prone. Between the ears is not quite there IMO.
Johnny - hard to handle, but worth it in the right system. He will need a QB coach/OC that can get on the same page. But this guy does some special, special stuff. Not a good fit for the Titans with the current staff.
Murray - yes, although I think he will have some boneheaded games until he gets it all processed. Guys will play for him because he is mobile enough to extend plays, is football smart/tough, has a good arm and has good leadership qualities.