Though I'm not sure many would call him great, Saad was an outstanding fighter and imo the most entertaining to watch. But I'm early 80s all the way anyway. Love Marvin Johnson, Eddie MM, Saad, to a lesser degree Braxton.
Matt Franklin (Matthew Saad Muhammad) vs. Marvin Johnson II Matt Franklin (Matthew Saad Muhammad) vs. John Conteh I Matt Franklin (Matthew Saad Muhammad) vs. Yaqui Lopez II Michael Spinks vs. Marvin Johnson Bob Foster vs. Mike Quarry James Scott vs. Yaqui Lopez Archie Moore vs. Yvonne Durrelle I Jean Pascal vs. Badou Jack Jean Pascal vs. Marcus Browne Adonis Stevenson vs. Badou Jack Adonis Stevenson vs. Oleksandr Gvozdyk Artur Beterbiev vs. Oleksandr Gvozdyk Those are good to get going. If you want gore, Marcus Browne-Badou Jack (although the fight itself isn't that great).
Now for the ones that you can't watch, but might want to learn more about. Harry Greb and Jack Dillon.