In your opinion, who is among the best to imitate Jack Kirby's style? I don't mean flat-out copy. More like who can invoke that same spark of imagination?

 Nobody. That’s what made him so special. 

There are plenty of artists who certainly can conjure up his power without flat out imitating him like Walt Simonson, George Perez, John Byrne, jimmy Cheung, Bagley… The list goes on.