Lennox Lewis top ten heavyweight of all time?

I respect most of the posters here but you're sadly mistaken. Lennox Lewis would have obliterated guys like Joe Frazier and Ken Norton. Joe Frazier was a poor man's Mike Tyson (who by the way, would have KO'ed Smokin Joe in less than a round in his prime). Lennox was a tall boxer who could crush fighters with his powerful overhand right. All time greats who were KO'ed at least 2X: Hearns, Duran, Tyson, Gomez, Joe Louis, Jones Jr. and you want to tell me that they arent top ten of all time? Hopkins, Jones Jr., Holmes, Hagler, Sanchez, Gomez didnt have the best competition either but you cant say they arent top ten. The Ali and Marciano eras are way overrated. The mid 60s version of Ali was the best, no argument there. But Lennox had longevity and beat the best of his time. I believe the top 5 heavyweights of all time are Ali, Lewis, Louis, Foreman and Holyfield based on opposition and accomplishments. Why does everyone always think that fighters of todays era arent among the best??