Thinking of Marvel writers off the top of my head, my top picks for writer would be:
Saladin Ahmed, Matthew Rosenberg, Dennis Hopeless, David F. Walker, G. Willow Wilson, Robbie Thompson
They seem to be the most interesting choices to handle the Miles book, I think they'll do some great things with it.
Although, I do agree with alot of people in saying they should get Jason Reynolds back to do the comic, after how good his Miles novel was.