Q-tip is the only artist I know who could rival L.L.'s expansive career. Both artists got battle shit and songs the ladies love. Even though they peaked at different times of their careers; both are from Queens, New York. I know LL was never part of a group or a producer, but artist wise, LL could give it a go with Q-tip.
LL is a legend and he has to do a Verzuz. The only problem is trying to find an artist from his era that could rival a career as his.