Lennox was a perfect example of a boxer-puncher.

A boxer-puncher has the same goal as the slugger/brawler: he's looking to land that big punch and knock the guy out. But the two styles are fundamentally different, in that the boxer-puncher uses his exceptional boxing skill (jab, movement, countering, angles, ect) to set up that big power punch. The boxer-puncher is actively trying to find openings for the finish, but he doesn't force the issue like the brawler - he doesn't take stupid risks and leave himself exposed like the brawler. George Foreman pre-retirement was more of a brawler/slugger, but when he came back he became more of a boxer-puncher.

Guys like Lennox, Joe Louis, Alexis Arguello, and so many other immediately spring to mind.