Bronowski = fantastic talking?

Sure, it is:

Jacob Bronowski (18 January 1908 – 22 August 1974) was a Polish-Jewish British mathematician, biologist, historian of science, theatre author,

The original piece that you quoted is saying that it is wrong to say that "scientists are not good communicators". To show how false it is, the writer mentions a number of scientists who were or are famous for their communication skills. Jacob Bronowski was very well known in Britain when I was a child. He was known as "Dr Bronowski" and was often on the TV or radio. The others are

J.B.S. Haldane, British geneticist and evolutionary biologist
Steven Hawking, British theoretical physicist and cosmologist
Julian Huxley, British evolutionary biologist
Arthur Eddington, British astrophysicist
E. O. Wilson, American biologist
Richard Dawkins, British ethologist and evolutionary biologist

They are all famous for being skilled writers or broadcasters and for having done much to popularise science.

Excellent.
Thank you.