how many do you know?Alkan>Liszt=Thalberg? were there more?
I'm always reluctant to respond to these, where the original post contains so little effort to find out anything other than "someone tell me." But let's not forget to mention da Pachmann, who Wagner said would be a greater pianist than Liszt, and Liszt said played Chopin's works better than Chopin himself. Anyone who has doubts about da Pachmann based on his later eccentric endeavours, need only listen to his piano roll recording of Liszt's Don Juan fantasie, to hear the greatness.Walter Ramsey