Daniel Look [pictured here], now an assistant professor of mathematics at St. Lawrence University, once created a web page called “Mathematicians That Scare Me“. (A non-mathematician might have phrased it differently: “Mathematicians Who Scare Me”.
The link is now dead, alas — was it too scary? Perhaps someone will ask Professor Look to resurrect it.
Below, here, is Professor Look’s posted photo of Kurt Godel.
Kurt Godel is famous for devising the Incompleteness Theorem. Note that this photo of Godel shows only the man’s head and shoulders. It is incomplete.