Lewis could open up in spots but he wasn't a raging animal and he would revert to form. Steward would have Lennox as agressive as possible. Once Foreman hurt you he was a terror. He might end up worse for Joe. A more prolonged beating but he would have a chance return fire and perhaps get lucky.
I say maybe. The reason is when Lewis was faced with a dangerous opponent he showed his best. Lewis epitomizes the phrase" great fighters aren't always great, they're just great when they have to be."
Lennox Lewis fought more as an outside fighter behind the jab. Being disciplined and having Emmanuel Steward, Lennox would not fight in any other way. George Foreman is more of a brawler willing to stand in the pocket and slug it out.
I know Manny Stewart always felt his larger fighters should push back and bully the smaller man ala Hearsn vs Duran could see him telling Lennox to be aggressive and try to put Frazier on the back foot. Unlikely it would be like Foreman but he's a tough match for him although on the other side Lewis struggled with Mercer's pressure and Frazier is on another level.