Who do you think Hercules's archenemy was
Out of the 3 main contenders Hera, Ares and Dahak.
Its hard to say.
All 3 were responsible for tragedies in Herc's life.
Hera burned his family.
Ares killed his wife.
Dahak killed his best friend and forced him to fight him.
Of the three of them however Hera's was the only one that stuck I guess LOL.
Hera is typically his archfoe in the myths, however Ares is more of a classical nemesis to Hercules his dark twin, a son of zeus who uses his power for evil, he corrupted Xena, whilst Hercules put her on the path to redemption. On the other hand Dahak is the most powerful of the three. He's stronger than Hera and Ares combined. However Ares outlasts all of them in the end. Dahak is destroyed whilst Hera and Hercules make amends both in the last episode of the series and in Xena whilst Ares continues on as his archfoe for thousands and thousands of years even until the modern era where his still trying to get Hercules the Legendary Journey's off of the air.
Of the three of them I would say I like Ares the best as a character and Dahak as a villain. Hera IMO just sucks. She was interesting in the myths, but in the show she was so boring. She was just a big pair of eyes in the sky except for two episodes. I think I would have actually preferred it if she stayed in Tartarus. I loved that ending to her character "I wont miss you" I'm sorry but I refuse to believe Hercules would ever trust the woman who murdered his children I also didn't find Hera's heel face turn in God Fearing Child either. Dahak was more scary and Ares was a better foil for him someone Sorbo could actually act against as opposed to a big pair of eyes just laughing.
However I guess as Hera burned his family she probably is the strongest contender.