In that light, I'd put in the top category Euclid of Alexandria (c. 300BC), the father of Geometry and a predecessor to another needed for inclusion, Archimedes of Syracuse (280-212BC)! For millennia, children have learned Euclid's Elements and from his books has come REASONED learning, a prerequisite of all science. And if the above 2 ancient Greeks are not enough, let's add Pythagoras of Samos (570-495BC) as a candidate for the title of "Father of Mathematics!
Remember, there is a reason for Western Civilization being called a Greco-Roman-Judaic Civilization. And when you consider that all of these men did their work in an era preceding Indo-Arabic Numbers, it is even more impressive!
Howard Johnson was a big fan of Louis Pastuer.
Thanks. That’s insightful and gives me some reading for the day.