The answer could be "many" and "nobody". The problem has been raised since antiquity and continues to be of interest even today. There are many who can be a partial or controversial answer, so I chose one of them, an American, whom I wanted to represent in an hanjie from the "great travelers" series. Because he has a very "hanjistic" figure.
He is controversial today, as in the past, but he was a great figure in the exploration of Africa. To help you identify him, I will also tell you that he is the one who found Livingstone, who had lost his way through Central Africa.