Stephon Gilmore. Like Kuechly, he fills a posiition of need, but one I see as higher than OLB. Not knowing off the top of my head, but Florence has got to be close to 30, McGee is on the wrong side of 30, and this is a sink or swim year for McLovin. He either figures it out or he's done.
Gilmore has all the traits you want in a CB in this NFL. Size, speed, experience, desire to improve (dedication to weight room and film room) and he started at CB and played at a high level right off the bat from his first day on campus at South Carolina despite being a high school QB who didn't play defense.