James Bettcher had Deone Bucannon play the position he created when he was in Arizona. Mark Barron played a similar role for the Los Angeles Rams.
I see 4 candidates that can possibly fill this role for the Giants defense. Jabrill Peppers, Julian Love, Corey Ballentine and Ryan Connelly.
I think the Giants had one of the first "moneyback" type player when Shaun Williams was on the team. He was a solid cover safety and he could play tough on the line.