Question:  Sainte-Beuve deemed Athalie comparable to an Athenian tragedy by who?

Context paragraphs:
Children of Heracles: Children of Heracles (Ancient Greek: Ἡρακλεῖδαι , "Hērakleidai"; also translated as "Herakles' Children" and "Heracleidae") is an Athenian tragedy by Euripides that was first performed c. 430 BC.  It follows the children of Heracles (known as the Heracleidae) as they seek protection from Eurystheus.  It is the first of two surviving tragedies by Euripides where the children of Heracles are suppliants (the second being "Heracles").

Athalie: Athalie is a 1691 play, the final tragedy of Jean Racine, and has been described as the masterpiece of "one of the greatest literary artists known" and the "ripest work" of Racine's genius.  Voltaire considered the play the greatest triumph of the human mind, while Flaubert referred to it in "Madame Bovary" as the masterpiece of the French stage, and Sainte-Beuve deemed it comparable to "Oedipus Rex" in beauty, with "the true God added."  August Wilhelm Schlegel thought Athalie to be "animated by divine breath"; other critics have regarded the poetics of drama in the play to be superior to those of Aristotle.

Kommos (theatre): A kommos (from Greek κομμός, "kommós", literally "striking", especially "beating of the head and breast in mourning") is a lyrical song of lamentation in an Athenian tragedy that the chorus and a dramatic character sing together.  A kommos occurs "when the tension of the play rises to a climax of grief or horror or joy".  Examples include the final section (lines 908-1077) of Aeschylus' "The Persians" (472 BCE) in which Xerxes laments the defeat of his Persian army, the final appearance of Antigone in Sophocles' "Antigone" (c.442 BCE), the interaction between the chorus and Oedipus when he returns having blinded himself in Sophocles' "Oedipus Rex" (c.429 BCE), and the exchange between Orestes, Electra and the chorus immediately after Clytemnestra's murder in Euripides' "Electra" (c.410 BCE).

Oedipus (Voltaire play): Oedipus (French: "Œdipe" ) is a tragedy by the French dramatist and philosopher Voltaire that was first performed in 1718.  It was his first play and the first literary work for which he used the pen-name Voltaire (his real name was François-Marie Arouet).  In adapting Sophocles' Athenian tragedy "Oedipus Rex", Voltaire attempted to rationalise the plot and motivation of its characters.  In a letter of 1719 he indicated that he found it improbable that the murder of Laius had not been investigated earlier and that Oedipus should take so long to understand the oracle's clear pronouncement.  Voltaire adds a subplot concerning the love of Philoctète for Jocaste.  He also reduces the prominence of the theme of incest.

Oedipus Rex: Oedipus Rex, also known by its Greek title, Oedipus Tyrannus (Ancient Greek: Οἰδίπους Τύραννος IPA: [oidípuːs týranːos]), or Oedipus the King, is an Athenian tragedy by Sophocles that was first performed around 429 BC.  Originally, to the ancient Greeks, the title was simply "Oedipus" ("Οἰδίπους"), as it is referred to by Aristotle in the "Poetics".  It is thought to have been renamed "Oedipus Tyrannus" to distinguish it from "Oedipus at Colonus".  In antiquity, the term “tyrant” referred to a ruler, but it did not necessarily have a negative connotation.

Mythos (Aristotle): Mythos is the term used by Aristotle in his "Poetics" (c. 335 BCE) for the plot of an Athenian tragedy.  It is the first of the six elements of tragedy that he gives.

Women of Trachis: Women of Trachis (Ancient Greek: Τραχίνιαι , "Trachiniai"; also translated as The Trachiniae) is an Athenian tragedy by Sophocles.

Herakles (Euripides): Herakles (Ancient Greek: Ἡρακλῆς μαινόμενος , "Hēraklēs Mainomenos", also known as "Hercules Furens ") is an Athenian tragedy by Euripides that was first performed c. 416 BCE.  While Herakles is in the underworld obtaining Cerberus for one of his labours, his father Amphitryon, wife Megara, and children are sentenced to death in Thebes by Lycus.  Herakles arrives in time to save them, though the goddesses Iris and Madness (personified) cause him to kill his wife and children in a frenzy.  It is the second of two surviving tragedies by Euripides where the family of Herakles are suppliants (the first being "Herakles' Children").  It was first performed at the City Dionysia festival.

Alcestis (play): Alcestis ( ; Greek: Ἄλκηστις , "Alkēstis") is an Athenian tragedy by the ancient Greek playwright Euripides.  It was first produced at the City Dionysia festival in 438 BC.  Euripides presented it as the final part of a tetralogy of unconnected plays in the competition of tragedies, for which he won second prize; this arrangement was exceptional, as the fourth part was normally a satyr play.  Its ambiguous, tragicomic tone—which may be "cheerfully romantic" or "bitterly ironic"—has earned it the label of a "problem play."  "Alcestis" is, possibly excepting the "Rhesus", the oldest surviving work by Euripides, although at the time of its first performance he had been producing plays for 17 years.

Andromache (play): Andromache (Ancient Greek: Ἀνδρομάχη ) is an Athenian tragedy by Euripides.  It dramatises Andromache's life as a slave, years after the events of the Trojan War, and her conflict with her master's new wife, Hermione.  The date of its first performance is unknown, although scholars place it sometime between 428 and 425 BC.  A Byzantine scholion to the play suggests that its first production was staged outside Athens, though modern scholarship regards this claim as dubious.

Supporting paragraphs: Athalie Oedipus Rex
Answer: Sophocles