Ernst Mayr
Mayr was awarded the Linnean Society's prestigious Darwin-Wallace Medal in 1958. He was never awarded a Nobel Prize, because there is no such prize for evolutionary biology. He commented that Darwin would not have received one, either. Mayr did win a 1999 Crafoord Prize. That prize honors basic research in fields that do not qualify for Nobel awards, and is administered by the same organization as the Nobel Prize.