Often considered the most important Buddhist philosopher after Shakyamuni himself. Brought together several preexisting Buddhist notions into the general concept of
sunyata, emptiness; developed the two-truths doctrine, from which is derived the concept of 'expedient means' that finds its most accomplished expression in the Lotus Sutra; radically relativized Mahayana Buddhist cosmology and epistemology.
Posted in part because he's a subject of scholarly interest for me, in part because afleitch has a point about most of the people this board has these threads on being relatively anodyne modern Christians, and in part as an attempt to attract anvi's attention to this board again.
FF; while I'm not sure that it's fair for me to vote FF or HP on a thinker so important to an entirely different religion, his thought definitely does fascinate me.