Some fighters seize the public’s imagination with awe-inspiring one-punch knockouts. Others bedazzle with bursts of supersonic speed. A few grab headlines with their retina-burning attire, their inspirational life stories or their inflammatory trash talk. Onetime light heavyweight champion Harold Johnson, who died Thursday morning at 86, didn’t take any shortcuts to earn his greatness. He was a solid citizen in a sport saturated by crazies, criminals and characters. He was the guy who clocked in every day and did his job in such a classy, dignified manner that one couldn’t help but admire his excellence. Johnson was a beautifully proportioned...