Donald Knuth is known, in my family, as the God of Computer Science. He has a pipe organ in his house. His magnum opus, The Art of Computer Programming, is the ultimate reference on data structures and algorithms. I think there are 4 or 5 volumes out now, but that may be a slightly generous estimate. In my considered opinion, there are probably better coders than Donald Knuth in this world, but there are no better computer scientists.

He rightly said: "Premature optimization is the root of all evil."