Plato isn't the best philosopher of all time because he is white and male. The Enlightenment is open and inclusive. Plato used to be a slave and elevated a woman to the highest philosophical position in the Symposium.
I don't think the quote in the OP is talking about Plato's works or conduct, but how Plato figures into a modern person's, Geoffrey West's, relationship to history. In that context, I don't understand the relevance of your comment.