At the time Holyfield clearly had the more impressive career. 3 time world champion like Ali, wins over the types of Bowe and Tyson, was regarded after the Tyson win as the number 1 guy in the division, while Lewis was like Wilder in this era just the holder of the WBC belt who was seen as vulnerable after the loss to McCall. Holyfield was also involved in more exciting fights and seen as an ATG by many people after the Tyson wins. Obviously time has passed and people opinions have changed. I recall near the end of both their careers debating who would be rated higher between the two and it seems my view that Lewis while not rated as highly at the time would go on to be regarded as the better fighter and it does seem that is the general opinion now. While Holyfield did at the time have the more impressive career, it's also now viewed that Lewis' less impressive, albeit still very deep resume, is down to Bowe and Tyson ducking him and depriving Lewis of the big fights. Holyfield himself has said he benefited from Bowe and Tyson ducking Lewis resulting in him being chosen instead to fight them both and garnering the biggest wins of his career with the Bowe rematch and the two Tyson wins. Throw in Moorer also ducking Lewis when asked if he would unify after beating Evander he said he didn't think he needed to unify against Lewis. Lewis' longevity and ended up being the last man standing in a stacked era is where he's been able to separate himself from the likes of Holyfield, Bowe and Tyson and why he's ranked above them in the majorities eyes but in terms of resume and career highlights I do think Holyfield was more impressive though of course the Balco drug scandal which he was involved in has probably tarnished some of what he had achieved.