Some of my favourite mathematicians. “S” means that I have downloaded their interesting articles and listed the missing ones in scratchbook. “I” means that I have indexed his/her work in the DB, i.e. skimmed and taken brief notes.
Add the following: Bourbaki people, and automorphic people: Frenkel, Gelbart, Arthur, Shahidi, Piatetiskii-Shapiro, Rapoport, Zink, Yekutieli, Wells.
See the Fields medallists volume for Atiyah, Novikov, Mumford, Voevoedsky, Mori, Connes, Witten, Kontsevich.
nLab page on Mathematicians