I think chinander would be a good fit. He's coached for Kelly before. Obviously frost is running Kelly's system so he's used running the D for an uptempo guy.
Saw the Alabama LB coach Tiopu or whatever his name is floating around today. Also saw the OC at Ohio State as he has played for and coached with Kelly
@Brett_McMurphy: Jim Leavitt had verbal agreement w/Kansas State last year to become head coach-in-waiting & replace Bill Snyder in 2018, but Snyder nixed it because he wanted his son Sean to replace him https://www.facebook.com/TheBrettMcMurphy/