#2 Baron Corbin - 157 matches
At #2 on this list is Baron Corbin with 157 matches, which not many people would have guessed considering he was an Authority Figure for a few months at the end of the year.
Corbin was traded to RAW during the Superstar Shake-Up, and debuted a new character, who had a more corporate look, but was still conniving, deceptive, and a good heel. Corbin became the RAW Acting GM when Kurt Angle was sent on vacation, and Corbin took matters into his hands, siding with the heels and inevitably making it incredibly tough for the babyfaces to win.
He feuded with the likes of Finn Balor, Bobby Lashley, Roman Reigns, and ended the year in a feud with Braun Strowman, losing to The Monster Among Men at TLC, while also losing his role as Acting GM.
It looks like Corbin will continue his feud with Seth Rollins at the start of 2019, although we aren't quite sure where Dean Ambrose fits in these plans.