Cuaron, Nolan, Del Toro, and Affleck off the top of my head.
Nolan is the obvious one. Cuaron is going to depend on what he does next I think. Del Toro I think is questionable given he's really hit and miss for some people. Affleck maybe, I could definitely see him becoming Scorsese-like for this generation depending on his next few directing jobs. I think O'Russell and Aronofsky are potentials too.