(I am not discussing classical as in 1750-1820, but as the 'Classical Music' tradition as a whole)
I was wondering if there are any of them, and if so, who in particular...because it looks like classical music training generally provides the highest standards of technical demands in any genre.
But I'm curious about the world out there. Are there any non-classical pianists, like those who play rock/jazz/whatever, who have attained levels of virtuosity close to that of, or equal to, say, Hamelin, Richter, or Volodos?