Who will make you want to attend his/her concert?
I don't separate male pianists from female--all that matters is if one speaks something with the music, or just plays piano (even well). From the alive pianists, other than Grigory Sokolov, I'd put on my list pretty much (widely) unknown or well underrated names, but I'd still suggest to check them out--all of them are on youtube:
my favorite ingenious Ekaterina Novitskaya, Oleg Boshniakovich (who due to his illness plays only in Moscow, and whose music making is simply sublime, for the lack of better word), one of the most serious musicians of our times Alexei Lubimov, breathtaking spectacular Ilana Vered, Valery Afanassiev, Alexander Serdar, Sergei Babayan, Alexander Korsantia... and at least a dozen of other very interesting musicians, who for one or another reason unfortunately did not make it to the very top, but IMO, by far much more interesting to listen to and enjoy than most of so called "top" modern pianists.
Some of the famous names, whose concerts I attended, but for sure will never go again:
Maurizio Pollini
Emanuel Ax
Nikolai Luganski
Efim Bronfman
Lang Lang
Yuja Wang
Best, M