Answer:
To be honest, it all depends on whether you think his actions of unnecessary violence against monsters or evil individuals are horrific or acceptable. However, I feel Heracles is a positive character because, while being depicted as a ruthless and violent hero, he only fought horrible individuals and demons, not innocent people.
At the beginning/ front of the dictionary
In his "Letter from a Birmingham Jail", Martin Luther King Jr. resort to Socrates to highlight his practice of a fair form of civil disobedience and non violence, as a symbol or analogy to back up his interjection outlining the urge of awakening from the "dark depths of prejudice and racism" of society at that time.
