Michael Atiyah
He was president of the Royal Society (1990–1995), master of Trinity College, Cambridge (1990–1997), chancellor of the University of Leicester (1995–2005), and president of the Royal Society of Edinburgh (2005–2008). From 1997 until his death, he was an honorary professor at the University of Edinburgh. During 2018 International Congress of Mathematicians, Atiyah said he had a proof for Riemann hypothesis.