Except he threw a hook. Roy Jones also started combinations with a hook or threw raw hooks. And Wilder and Johanson threw right hand leads without setting up with a jab.
90's George struggled with some pretty mediocre opponents. Everyone remembers the shining moment but forgets the many rounds lost to younger, more lively opponents. Rahman was not mediocre. And he was also not a weak, shrinking violet of a fighter. Foreman would have found a guy who was at least his equal in the strength department, a factor which would cause George to constantly reset, at which he was terribly slow during this part of his career.
Rahman was, in fact, "mediocre" as he lost to nearly every quality opponent he ever faced. His whole notoriety is centered around his highlight KO over an undertrained, overconfident Lennox Lewis, who promptly destroyed him in the rematch. He also had his share of losing efforts against fighters who were far older or smaller, like Holyfield and Toney.
Rahman was a push puncher and slow as a sloth. Foreman despite being old in his comeback had the quicker hands and feet. The beating Foreman would put on this guy would be unmerciful.
He wasn't Alex Stewart or Lou Savarese or Axel Shultz mediocre. He was the next level of mediocre above that. Elite mediocre... or Mediocre Elite. And he also beat one-loss future champ Corrie Sanders