I would not say that rigo is inconsistent. But I never know what am I going to witness. A master class or a snooze fest. We never know until the fight happens. He can do the best ever and the most boring stuff ever too, and you will not know until the fight night comes.
Antonio Tarver. Harding breaks his jaw and wins a decision, Tarver crushes him in 5 in the rematch. Goes on a decent run of form with Reggie Johnson and Montel Griffin and even beats RJJ, but then inexplicably loses to Johnson. Beats Johnson and RJJ again then gets dominated by Hopkins and then loses 2 fights to Dawson. Even in his first fight with RJJ he had rounds where he was winning then would do nothing and give rounds away due to inactivity. He was a very frustrating fighter to be a fan off, you never knew if he'd show on on form or just sleep walk his way through to a loss.
Danny Jacobs, Zab Judah, James Degale, Luis Ortiz and I have to add Amir Khan even with his glass chin being his main problem. Could look like lightening one moment, and then a complete car crash the next. He did this prior to winning world titles and after