In no particular order:
Zhu Xiao-Mei, for her Bach, Scarlatti, Schubert and anything and everything else
Horowitz, for everything
Hamelin, for everything
Gould, for insights into the baroque
Pires, for her Mozart
Perahia, for almost eveything
Hough, for his Liszt
Uschida, for her Mozart and Schubert
Worse, for me:
...Pollini.