This is Dieter Schwarz - the owner of Lidl, the richest man in Germany, one of the richest people in the world.
Only two known photos exist of him, zero video footage, and he's never given an interview.
He is an extremely dedicated philanthropist, having put billions mostly into educational causes. He lives in Heilbronn, in Germany, and has transformed the area into an educational/tech/research hub, as well as funding educational activities at Oxford, HEC Paris, Stanford and many others.
Technically, he doesn't actually own Lidl any more, as he set up 'The Dieter Schwarz Foundation' - a charity - which owns the Schwarz Group, the parent company of Lidl. In other words, Lidl is owned by a charity that ploughs lots of money into educational causes - and yet Lidl never use any of that in advertising.
One of the most successful, interesting people on earth, and nobody even knows what he looks like any more.