While this field was built by the efforts of countless brilliant people, who are, in your opinion, the ones who had the most influence? People who worked on the "computer" side of the field, and not just mathematicians.
Start with C. Shannon and A. Turing for the CS, and E. Dijkstra and N. Wirth for software engineering (and also to understand the difference between CS, SE, and programming. Spoiler: CS is mathematics. SE is engineering. Programming is a craft.)