Theban kings - Greek mythology
The dynastic history of Thebes in Greek mythology is crowded with a bewildering number of kings between the city's foundation (by Cadmus) and the Trojan War. This suggests several competing traditions, which mythographers were forced to reconcile. Cadmus was the first king of Thebes; but the city was originally called Cadmeia, and (according to myth) it only became known as Thebes during the reign of Amphion and Zethus, after the latter's wife Thebe. In short, the list of kings are as follows: Cadmus, Pentheus, Polydorus, Nycteus (regent), Lycus (regent), Labdacus, Lycus (again), Amphion and Zethus (joint rulers), Laius, Creon (regent), Oedipus, ?Creon (again), Eteocles, Creon (again), Laodamas, Thersander, and Tisamenus.
Cadmus was immediately succeeded by his grandson Pentheus, who met a tragic end after falling foul of the young god Dionysus. Cadmus' son Polydorus (who must have been a minor when Cadmus abdicated in order for Pentheus to have succeeded Cadmus) then became king. In any case, Polydorus' reign seems to have been brief, given that when he died the kingdom was entrusted to his father-in-law, Nycteus. Nycteus acted as guardian for the young Labdacus, the son of Polydorus and Nycteis.
During the regency of Nycteus, Thebes (Cadmea) made war against Epopeus, the king of Sicyon. The cause was simple and just: Epopeus had abducted Nycteus' beautiful daughter, Antiope. (However, an alternate account says that Antiope fled Thebes to evade her father's wrath, and sought refuge with King Epopeus after finding herself pregnant by the god Zeus.) Nycteus and the Thebans were defeated, and Nycteus himself died of his battle wounds. He was succeeded as ruler of Thebes by his brother, Lycus.
Labdacus eventually became king and took the reins of power. Another war erupted, this time over a boundary dispute beteween Thebes and Athens. Once again, Thebes was defeated after King Pandion of Athens received aid from the Thracian king Tereus. Labdacus himself survived the war. Alas, following in the footsteps of Pentheus, King Labdacus opposed the cult of Dionysus, and was killed by Dionysus' enraged devotees, the Maenads. Labdacus left behind a young son, Laius. Lycus again took control of Thebes, this time as a usurper, and denied Laius his birthright. This inaugurated a new dynasty. Lycus is said to have reigned for twenty years.
Lycus, as king and ruler of Thebes, waged war against Sicyon to avenge his brother and niece. This time, the result went in Thebes' favor, and King Epopeus was slain. However, Lycus and his wife Dirce proceeded to treat Antiope cruelly. Antiope was imprisoned' but she later contrived to escape, and was reunited with her twin sons: Amphion and Zethus.
Amphion and Zethus were the sons of Zeus by Antiope, conceived while Antiope was still in Thebes; they were born in secret and raised by shepherds in the vicinity of Mount Cithaeron. After their tearful reunion with their mother, Amphion and Zethus marched on Thebes and slew King Lycus and Dirce.
Lycus' death did not restore Laius to the throne. Amphion and Zethus siezed power, ruling as joint kings of Thebes, and expelled Laius. Amphion's wife was Niobe, daughter of Tantalus, and they had seven sons and seven daughters together. Amphion and Zethus expanded the city (and renamed it Thebes) and built the seven gates of Thebes, naming them after Amphion's daughters (Thera, Cleodoxa, Astynome, Astycratia, Chias, Ogygia, Chloris). Niobe, a boastful woman, attracted the wrath of the goddess Artemis, who killed all of her children. Amphion committed suicide after the death of his beloved children. Zethus' son and only child had been killed earlier, and Zethus had died of a broken heart. Thus, the throne of Thebes was vacant.
During the reign of Amphion and Zethus, Laius resided in the Peloponnesus under the protection of King Pelops. After the deaths of Amphion and Zethus, Laius was invited back by the Thebans and became the next king, thereby restoring the original dynasty of Cadmus. When Laius became king, he married Iocasta, daughter of Menoeceus, son of Pentheus. Given that the Delphic oracle warned Laius not to have a son because that son was fated to kill his own father, Laius exposed his newborn son - who nevertheless survived, and grew up under the name of Oedipus. In a tragic and convoluted tale - in which every step Oedipus took to avoid the oracle's predictions brought him closer to his fate - Oedipus killed King Laius and married Iocaste. Oedipus then became king of Thebes, as husband of the widowed Iocaste. The couple had four children, including two sons, Polyneices and Eteocles.
When the seer Teiresias revealed Oedipus' horrible crimes - fratricide, regicide and incest, no less - Oedipus was forced to abdicate. Iocaste killed herself, and Oedipus was shunned by his own children. Oedipus responded by cursing his sons Polyneices and Eteocles.
Polyneices and Eteocles made a pact that each should rule alternately for one year at a time. But Eteocles reneged on the pact, and Polyneices was banished from Thebes. Polyneices fled to the court of King Adrastus of Argos to raise an army against his brother; the subsequent war became known as the "Seven Against Thebes"". In this war, Polyneices and Eteocles were each slain by the other, thus fulfilling Oedipus' curse.
After the deaths of Polyneices and Eteocles, a man named Creon next became king of Thebes. As a son of Menoeceus and Iocaste's brother, Creon was uncle to Polyneices and Eteocles. Creon had ruled earlier it seems (probably as regent) during the interlude between the death of King Laius and the arrival of Oedipus. It was during one of these reigns that Heracles was born in Thebes. Creon perhaps also ruled immediately after the disgrace and expulsion of King Oedipus, in the period before Oedipus' sons reached their majority. Creon served as protector of Heracles, his stepfather Amphitryon, and mother Alcmene. Creon even gave his daughter Megara in marriage to Heracles. In return, Heracles defended Thebes in two more wars that Thebes became entangled in, first against King Erginus of Minyan Orchomenus, then against King Pyraechmus of Euboea.
In any case, it was Creon who expelled Oedipus, and who later prohibited a proper burial of Polyneices and his Argive allies. Theseus, King of Athens, led an army against Thebes and compelled Creon to give the fallen heroes the correct rites. When Eteocles' son Laodamas came of age, Creon resigned the Theban throne in his favor. Like his father, King Laodamas was confronted with a hostile Argive army, this time led by Polyneices' son Thersander (see the Epigoni). This time the Argive army succeeded, and Thersander was installed as king of Thebes. King was killed died during this war.
Thersander joined the Greek forces in the Trojan War, but he was killed on the shores of Mysia before ever reaching Troy. His son Tisamenus was too young at the time to lead the Boeotian contingent; but he later came of age while the war was still going on, and entered the war close to its conclusion. This is the explanation given for why no Theban leader is mentioned by Homer in the Iliad.