Dan Freed
And what about Jim Simons? Other than Chern Simons he did amazing stuff. Wu-Yang ...and that holonomy theorem of Berger was first rate.
Anyone else appreciate that Jim Simons redoing Berger's list of holonomy groups to prove intrinsic sphere transitivity? An artist's theorem.
Someone else I admire: Dan Freed at Austin. Dan never gets all the credit he deserves. Every paper nails some loose end for the community.
In Econ. Krugman is the master chef who can start with deadly pufferfish and dependably prepare elegant fugu thats safe to eat.