Simplify the following text for a Grade 10 native English-speaking person.
Original: It is a testament to the quality of Euripides ' plays that , though their survival was dependent on the letter their title began with and not ( as with Aeschylus and Sophocles ) their quality , they are ranked alongside and often above the plays of Aeschylus and Sophocles .
Simplified: Euripides was the last of the three greatest Ancient Greek writers of tragedies , the others being Aeschylus and Sophocles .