#3 Dean Ambrose: 84.8 Win Percentage
No good Dean goes unhinged? The man definitely isn't punished by WWE brass as Dean Ambrose, the resident "lunatic fringe", racked up one of the most successful win percentages of the year, and ranks third on our list of most successful champions of 2017.
Thank god he wraps his fists, because Ambrose competed more often than anyone else on this list, totaling 128 wins out of 151 matches for a win percentage of 84.8%, good enough for third on the list.
Ambrose's successful 2017 was undoubtedly aided by two separate title runs, a 152-day title reign as Intercontinental Champion and a Shield Reunion tour that has resulted in him and Seth Rollins taking home the tag team titles for a 78-day reign. Ambrose has spent most of the year as some sort of champion, making it no surprise that he lands on our list.