I know that this doesn't fit alphabetically, but this is the order that they're in on the Loeb website.

The second historian and, I think, the best. He wrote a history of the Peleponnesian War which cannot be topped. Unlike Herodotus he actually analyzes events and explains the reasons underlying them.

The greatest latin poet. The Aenid is the story of Aeneus after his escape from Troy and his founding of Rome.

The Greek historian who finished Thucydides chronicle where it left off.