Thomas Henry Huxley
His scientific debates against Richard Owen demonstrated that there were close similarities between the cerebral anatomy of humans and gorillas. Interestingly, Huxley did not accept many of Darwin's ideas (e.g. gradualism), and was more interested in advocating a materialist professional science than in defending natural selection.
Huxley was the founder of a very distinguished family of British academics, including his grandsons Aldous Huxley (the writer), Sir Julian Huxley (the first Director General of UNESCO and founder of the World Wildlife Fund), and Sir Andrew Huxley (the physiologist and Nobel laureate).
Thomas Henry Huxley died on 29th June 1895.