10-0 with 10 KOs wouldn't surprise me. But when the knockout didn't come, Lewis was perfectly content boxing when the rhythm dictated such. So I'm going to say 10-0 with 8 KOs.
220lb ripped at 5'10 is huge, it's like those bodybuilders in the 1970s and we all know they were using gear. There has never been a boxer as muscularly dense before or after as Mike Tyson. He has the highest body mass index for a non fat heavyweight. He was not a dedicated weight lifter either, he was doing lots of cardio, so him being natural is highly unlikely.
Lewis wrecks Joshua badly. Styles make fights. Bigger puncher as well as better boxer. This would be like the golota or briggs fight. Lewis was vicious against fighters of similar height and unlike wilder he would attack with precision and technique Lennox is a better boxer than anyone on this list except for fury and a better puncher than anyone except for wilder(and that's debatable because he has much greater punch variety to hurt people with) Yes he got KOd twice but he also happened to fight nearly everyone there is to fight in his era. Assuming he stays focused he beats everyone. And I'm saying this as a big Fury fan.
I think Wilder's right cross is more powerful than Lewis's best punch, but Lewis has more powerful punches. It's also debatable he's a better boxer than Fury, I'd say his footwork and ring IQ are both higher. Both have good defences, with Fury's being better imo, just Lewis sometimes got carried away with his power and started pawing instead working his jab. When he was outjabbed he started to brawl, Fury just changes his preferred range and counter punches. Agreed, too much is made of these losses, the punch that Rahman landed would've put any HW without a Foreman like chin in serious trouble and probably could've KOed a dinosaur. McCall landed a beautifully timed cross that they had trained to land, that would've KOed both Wilder and AJ imo. That was the general idea, everyone vs the Lewis from the Golota fight Big fan as well
Lewis stops every one of these guys. None of them have faced anyone close to Lewis. Superficially Wlad is close, but unlike Wlad, Lewis could adapt. Lewis could box, or he could switch gears and just maul you. Fury probably causes the most problems, but I se Lewis turning the fight ugly and wrecking Fury's face and forcing a stoppage. Lewis handles AJ in similar fashion to Grant. He destroys Wilder much easier than Fury did. Lewis would have put him down and kept him down.
Lennox would win all ten but he wouldn't stop them all. One or two would fight to survive and he'd get a UD. But 1-12 a KO would be possible in all 10.
Lewis would handle Aj the way he fought Golota, he would press forward with the jab in spots but also box, move and use his superior reach at range when Aj unloads his combos just like when Golota did. Lewis will eventually land and stun Aj then Lewis blows his back out like he did Golota. Probably round 6
I agree with MarkusFlorez99 who said Fury would give him the most trouble. I'm leaning 10-0, with 7 to 8 KO's.