Say from the past 40 /50 years, who really tests the Brown Bomber? I's it the akward ones like Jimmy Young, Michael Spinks, Chris Byrd? Or the big hitters maybe, Foreman, Tyson, Lewis? Or Swarmers maybe?
Byrd because he was a southpaw and had clever defence. Tyson Holmes Lewis Liston Foreman Young Would all be stiff tests imo
Both a vengeful Lewis, and FOTC fired-up Frazier come to mind. I don't think 1980 Holmes would make Joe very happy. 1964 to 1974 Ali
Ali, Tyson, Foreman, Lewis, Frazier, Wlad would be interesting to see. Shavers, Bowe and Norton would be interesting to see. I dont say they would be a big challenge for Louis, but still it would be interesting to see.
Anyone who can keep him at range and out jab him would give him trouble Louis did his best work in close range when he can unload his combinations if you don't give him the chance to do that it would be a tough fight for him.