It seems like he did everything! I first heard of Von Neumann in international relations & economics classes as the person who established game theory, then later in CS classes as the creator of mergesort, cellular automata, Von Neumann architecture, etc.
Wait til you hear about what he did in Math and Physics...
Very easy to claim he was the most intelligent human to ever live. Or perhaps he was never human...
https://en.wikipedia.org/wiki/The_Martians_(scientists)