Ten hours ago, someone asked me who deserved the Milner Breakthrough Prize in Fundamental Physics last night. I couldn't write the answer in time and I don't have a clue who would be the right choice in mathematics (Jean Bourgain of Princeton's Institute won it and I am not sure I have ever heard the name; note that a special 2016 prize previously went to the three founders of LIGO) but my answer for fundamental physics would obviously be Polchinski, Strominger, and Vafa.
Strominger (L) and Vafa (R), (C) LM 2003
This prediction – and this wish – was no rocket science let alone string theory. Already three years ago, these three men were candidates for the prize along with Green and Schwarz who have received the award.
A webpage on the Breakthrough Prize server explains that the men got it
[f]or transformative advances in quantum field theory, string theory, and quantum gravitywhich are nicely chosen words. These words would be right for most of the big shot string theorists but be sure that there are at most a dozen or two whose work would really deserve these words and these three men belong to that top notch group.
The Breakthrough Prize also quotes their "acceptance remarks" in which the researchers summarize their work and explain their reasons why they feel the work is important. Cumrun Vafa also adds an impressive long list of more than 170 of his collaborators. Jonathan Heckman (whom I knew as a brilliant student at Harvard) has co-written incredible 29 papers with Vafa (and usually someone else). Your humble correspondent is in the bottom "also participated" portion of the list.