Hell, I'd freaking put Puig on the list. MLB needs a jolt of excitement for the casual fan...like what Mike said.
NL should be Harper, Wright, Puig and Carlos Gonzalaz. Justin Upton would be a good choice as well.
AL should be Trout, Cano, Fielder (or Miggy) and Chris Davis. You could do a Nelson Cruz and switch out Fielder....but Prince's name is bigger.