Stormzy i'm afraid wouldn't fare well in the U.S market Solo wise he needs to piggyback a heavyweight Artist like a Drake.What Drake did for the UK artist with ( more life ) was tremendous when it came to bringing awareness to the rest of the world . for e.g I had no idea who a Jorja Smith was or Giggs. The issue with the U.S market is that there is so much competition you really have to be doing something real special to stand out.