Aeschylus
Aeschylus comes from the theoretical background, mainly focusing on drama. He was the first of the three ancient Greek writers who focused on tragedy. Their plays can still be read or performed today. The others being Sophocles and Euripides. He is often described as the father of tragedy, our knowledge of the genre begins with his work and our understanding of earlier tragedies is largely based on inferences from his surviving plays. According to Aristotle, he expanded the number of characters in plays to allow for conflict amongst them, whereas previously characters had interacted only with the chorus. Aeschylus was a deep, religious thinker. Few poets have ever presented evil in such stark and tragic terms yet he had an exalted view of Zeus, whom he celebrated with a grand simplicity reminiscent of the Psalms, and a faith in progress or the healing power of time.
Euripides (480-406 BC)
Euripides was the second of the three great tragedians of classical Athens, the other two being Aeschylus and Sophocles. Some ancient scholars attributed ninety-five plays to him but according to the Suda it was ninety-two at most. Of these, eighteen or nineteen have survived. More of his plays have survived intact than those of Aeschylus and Sophocles together, partly due to mere chance and partly because his popularity grew as theirs declined he became, in the Hellenistic Age, a cornerstone of ancient literary education, along with Homer, Demosthenes and Menander.
Herodotus (484 – 425 BC)
Herodotus was an ancient Greek historian who was born in Halicarnassus, Caria. He is commonly referred to as the "Father of History." Herodotus is the first historian to organize his writings so that the narrative was vivid to the readers. His contribution to education, and the only piece of work that he has known to have produced was called The Histories. His writings in The Histories covered the Greco-Persian Wars. In his investigation of the origins of the Greco-Persian Wars included a wealth of geographical and ethnographical information. Although some of his stories were fanciful, he claimed he was reporting only what had been told to him. Little is known of his personal history. Here more information on Herodutus
Thucydides 460-395 BC
Thucydides was a Greek historian and Athenian general. His recording of the war between Sparta and Athens known as Peloponnesian War that took place around 411 B.C. . Thucydides has been considered the father of "scientific history." He placed specific standards on evidence gathering and analysis in terms of cause and effect without reference to intervention by the gods, as outlined in his introduction to his work. He has also been called the father of the school of political realism, which views the relations between nations as based on might rather than right. His text is still studied at advanced military colleges worldwide, and the Melian dialogue remains a seminal work of international relations theory. More generally, Thucydides showed an interest in developing an understanding of human nature to explain behavior in such crises as plague, massacres, as in that of the Melians, and civil war. Here is a Link on Thucydides.