Off the top of my head: Shannon, Nyquist, Hamming. Lapping them you say.
I have hopes of a resurgence of operations research and linear optimisation as goods in themselves: we could be plotting more nuanced courses in dark waters of competing pressure. Decision systems support across many fields would remove subjective, politicised pressures.
Linear programming, and even integer linear programming are pretty well solved practically speaking.
This stuff while old, is not routine for decision makers. They don't seem to grok how to formulate the questions and the choices.