You'd be talking basically Norton, Frazier, Young, Foreman and Lyle. Obviously he beat Norton, he also beat Foreman a year later in 74, he beat Frazier in 74 and 75, he stopped Lyle in 75 and a terrible version got by Young in 76, albeit with a bit of controversy. It answers itself. The only argument is did Foreman learn enough from his 74 loss to win in 76. That would be long long odds given how well Ali handled him in 74.
Shame it never happened mate, but yes it's another win for Ali. I think George would still have the memory of Zaire in his head tbh.
Even more stressing would be the realization that Ali had gotten 1 year younger after Zaire (73 Ali), while he himself had gotten 2 years older.