Olga Kern, from Russia, is the gold winner (with another Russian dude) of the last Van Cliburn competition (2001 I think).
I only know her Rach3, which is good and with plenty of adrenaline like most of her performances, but no particular originality or new light (kind of difficult after so many performances of the work).
For more detail about her, there is a documentary on DVD about the last Van Cliburn competition, where you will find many interviews and performances by her and her fellow competitors.