Stefan Banach. No show-off, pure born genius. Connects to JvN via Stan Ulam - Banach's student at Lviv Polytechnic Institute and the Manhattan Project participator.And the most charismatic (and clever ever) is
IMO the best American mathematician of the 20th century.
Good old times when knowledge and talent had more impact on science and world than manipulations, politics and hypes.
I can't wait for the whole AI bull**** to end, and we invest in some serious science. AI algos and tools are like malware exploit kits - every idiot can use them and cause a disruption.