[Isinlor]

For me personally:

  Alan Turing for model of computation
  Kurt Gödel for incompleteness theorem
  Erwin Schrödinger for "What is life?" book
  Hugh Everett for many-worlds interpretation of quantum mechanics
  Seth Lloyd for ultimate physical limits to computation
  John von Neumann for self-replicating spacecraft or von Neumann probe
  Robin Hanson for Grabby Aliens model
  Nick Bostrom for idea of existential risk
  Richard Dawkins for many God debates and books
  John Stuart Mill for Harm principle
  Elon Musk for rockets reusability
  Diogenes for simplicity and Diogenes and Alexander anecdote
  Horace for Exegi monumentum poem