[gorgonical]

I don't know but if you want to find out a good place to look is Luke Ranieri's Polymathy/ScorpioMartianus channels. He engages very actively with the Ancient Greek and Latin languages and his content is also useful for discovering other links.

The tl;dr with Ancient Greek as I understand it (warning) is that dramatically less content was written and over a much larger time period. Homer's works are even described as their own (Homeric) and as such it makes "Ancient Greek" a more nebulous term than "Latin," even when you account for Old/Classical/Late branches. In turn, making it in my estimation harder to have a Fr. Foster equivalent.

Look into it and let me know.