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Given the following post, respond as if you're commenting on Reddit:
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Are there any modern defenses or defenders of Plato's overall philosophy?

Do any modern philosophers argue that Plato was more or less correct in his major assertions about metaphysics, epistemology, and ethics?

I take "Plato's overall philosophy" to be roughly the positions that (1) our world is a defective version of a more real and perfect realm of Forms; (2) knowledge of these eternal Forms is imprinted on each person's immortal soul before birth; and (3) we live good lives to the extent that we contemplate and come to better understand these Forms, especially the Form of the Good.

Which contemporary philosophers are most thoroughly Platonistic?
gpt
Lloyd P Gerson's work might be a good place to start.  

He argues for a definition of Platonism as characterised by 5 negative theses: anti-nominalism, anti-mechanism, anti-materialism, anti-relativism, and anti-skepticism.  

Someone who defends all five 'antis' would be a true Platonist according to Gerson and he defends this view against its naturalist opposite, arguing also that positions seeking a compromise between the two are doomed to inconsistency. 

You can find a couple of his lectures on this on YouTube or read his new book Platonism and Naturalism: The Possibility of Philosophy.

Another modern philosopher who makes a case for Platonism, and does a really good job of placing Platonist positions (e.g. in philosophy of language) in dialogue with contemporary theories, is Julius Moravcsik.  I'd recommend his Thought and Language or Plato and Platonism.