If you ever looked a graphs (in computer science) you've come across the name Dijkstra. He is also known for a paper that became sort of a proto-meme: "Go To Statement Considered Harmful", and a number of other papers and pithy quotes, like this:
"Computer science is no more about computers than astronomy is about telescopes."
"I would therefore like to posit that computing's central challenge 'How not to make a mess of it,' has not been met."
Watching this video: A Programmer’s Early Memories by Edsger W. Dijkstra from The International Research Conference in the History of Computing at Los Alamos, 1976 make my toes curl - the contrast to e.g. Donald Knuth's or Konrad Zuze's stage presence is striking.