in this new age of technology. Yes. back then..Ali and Marciano. hard to lug around a huge camera from back in the day.
Life Magazine has a vast archive of photographs. They say they have: 1461 photographs of Manny Pacquiao. 2296 photographs of Oscar de la Hoya 1428 photographs of Floyd Mayweather 3014 photographs of Mike Tyson 1683 photographs of Evander Holyfield 3383 photographs of Muhammed Ali Of course those figures are not the be all and end all but they give a pretty decent picture I think of how often someone has been photographed by the mainstream media or photographers.
i personally would have guessed Ali or Tyson myself. They both have longevity and controversy that kept people writing about them.