I rather agree with Tyson about Argerich, Hewitt, and Uchida. I've never warmed to any of them, though I appreciate that others think they're each grand. Argerich in particular has a nervous quality that turns me off. If I were more of a Liszt fan, perhaps I'd appreciate her more. Obviously, she's a tremendous talent, just not my cup of tea.
Of the female pianists mentioned by others, I especially have enjoyed recordings by Olga Kern, Hélène Grimaud, Alicia de la Larrocha, and Simone Dinnerstein. So "+1" to those who mentioned them.
I forgot to mention Ekaterina Dershavina, whose Goldbergs are up there with those of the other two pianists I mentioned. Others that people might like to investigate include Klara Kormendi, whose Satie discs I've enjoyed a lot; and Anne Quéffelec, who has several recordings of French music and whose recent disc "Satie & Compagnie" on Mirare I think is marvelous. Finally, I have several discs on BIS by Noriko Ogawa, and I find her playing consistently interesting.
I will attempt to hear some of the others mentioned, and take another listen to Hewitt and Uchida.
(Need I say? I make no claims that the pianists that I mentioned are necessarily at the top of the heap -- but I enjoy their work -- nor do I claim to know the work of every pianist.)