Lewis was quite a complete package. Besides the size, strength and power, he was also a very smart operator with grit and ruthlessness to match. For him, like many others, his supreme abilities also bought with them a tendency of overconfidence, though.
Burns still owns him on the hips measurement of the tale of the tape : ) Steward really molded Lewis. Before Manny, Lennox need work on balance, clinching, and strategy to use his massive height and reach advantage.
Waldo gets a mention. And if it's just for show, Duncan Dokiwari was a monster. I'm a huge Lewis fan. He never had the greatest balance but when focused he most everything else.
It's practically impossible to single out just a couple. You could also pick amongst others, Evander Holyfield, Mike Weaver, a Young George Foreman, Razor Ruddock, Anthony Joshua, etc The list seems endless.
Weaver and norton are the best cause they didn't even lift weights, great aesthetics just from boxing and genetics. Tyson also didn't lift weights and was a freak of nature, built as a tank and lean. Carnera and abe simon also had ridiculous look and were possibly the strongest boxers ever. Holyfield, lewis, wlad, ibeabuchi, bruno etc... Lifting weights and probably drugs too.
I remember young, prime George Foreman in Caracas sharing the ring with Adonis Ken Norton and how much bigger, thicker and more powerful George looked than Ken. Foreman at that age was built for power...for power's sake. Functional though he was...he wasn't musclebound like Mike Weaver and anyone else nicknamed "Hercules"..Foreman had ridiculous, functional great strength to go with his punching power....more so than any other heavyweight champion, without being a "body beautiful" type like Norton, Holyfield or Weaver.
Shredded don't always mean success in this sport... http://images.usatoday.com/sports/boxing/_photos/2003-09-24-dokiwari-inside.jpg