I'll probably get shot down for this, but I don't see any candidates in the above posts who qualify as genuine Renaissance-type Scientists. As I understand it, such a polymath is someone who excels both in the sciences and humanities. Somebody who excels in two directly related (scientific) disciplines is to me not so much of a Renaissance man as one who excels in two totally unconnected disciplines such as maths and Sanscrit. Perhaps I am misunderstanding the OP.