My guess:
Hartline (WR/“Co-OC”) - Safe
Alford (RB) - Safe, unless he chooses to go elsewhere for a promotion
Bailey (TE) - Safe
Frye (OL/OC) - Gone. Likely replaced by a Dan Mullen type.
Defense intact. Maybe we see a replacement at LB coach with JL? If not I would look to see JL takeover for Fleming.
Dan Mullen would be a great choice, he's been a HC, probably not looking for another HC position, and may stick around "long term". I think Little Animal has to come on board with some full time coaching spot.
Eleven Warriors offers some names for the possible OC position:
We look at some names who could be worthy of consideration if Ohio State decides to add a new offensive play caller and/or quarterbacks coach to its staff.
www.elevenwarriors.com
WILL STEIN, OREGON OFFENSIVE COORDINATOR
JOE BRADY, BUFFALO BILLS INTERIM OFFENSIVE COORDINATOR
JOE MOORHEAD, AKRON HEAD COACH
DAN MULLEN, FORMER FLORIDA HEAD COACH
DOUG NUSSMEIER, LOS ANGELES CHARGERS QUARTERBACKS COACH
DINO BABERS, FORMER SYRACUSE HEAD COACH
J.T. BARRETT, DETROIT LIONS ASSISTANT QUARTERBACKS COACH
JERROD JOHNSON, HOUSTON TEXANS QUARTERBACKS COACH
JOE PHILBIN, OHIO STATE SENIOR ADVISOR AND ANALYST
BILL O’BRIEN, NEW ENGLAND PATRIOTS OFFENSIVE COORDINATOR
FRANK REICH, FORMER INDIANAPOLIS COLTS HEAD COACH
JOSH MCDANIELS, FORMER LAS VEGAS RAIDERS HEAD COACH
Just sayin': Almost any of those 12 would be a great hire.