Augeas

Augeas (in Ancient Greek: Ἀυγείας) was a demigod in Greek mythology. He was a Greek demigod son of the Titan Helios and sometimes said to be an Argonaut.

History
Augeas owned the greatest number of cattle in Greece (over a thousand), but had been too greedy to pay anyone to clean the stables for about 30 years. The fifth Labor of Hercules was to clean the Augean stables. This assignment was intended to be both humiliating (rather than impressive, as had the previous labors) and impossible, since the livestock were immortal and therefore produced an enormous quantity of dung. However, Hercules succeeded by rerouting the rivers Alpheus and Peneus to wash out the filth.

Augeas was irritated because he had promised Hercules one tenth of his cattle if the job was finished in one day. He refused to honor the agreement and Hercules killed him after completing the tasks. Hercules gave his kingdom to Augeas' son Phyleus, who had been exiled for supporting Hercules against his father.

The Battle of the Labyrinth
Geryon briefly mentions Augeas, saying that the latter owns the Flesh-Eating Horse's Stables, but Triple G Ranch watches over them for a "small monthly fee."