HERO is a strong word. I think my mother was a hero for fighting cancer. I think Jesus was a hero.
May I modify the question somewhat and put an answer to, "Who is your favorite historical figure of all time?"
To that question, I have three:
1--SOCRATES. Were he alive today, he would be indistinguishable from the general homeless. Always wearing a dirty toga and not caring what he looked like, he often ranted in the park and engaged in conversation with passers-by. Was arrested for sedition and corrupting the youth of Athens, when all he really did was tell anyone who would listen to always question authority. Without shame he accepted the death penalty.
2--THEODORA. The empress of Constaninople and wife of Justinian I, Theodora was born into poverty and prostitution to become the most powerful woman of the medieval world. A devout Christian, she was seen as the backbone Justinian never had. It was her strength that kept Justinian in power--it also led to the massacre of 30,000 men, women, and children in the Hippodrome in 532 AD.
3--GENGHIS KHAN. As a teenager, Temunjin was illiterate and orphaned, in the shackles of a rival chieftain and on the verge of death. From these auspicious beginnings, the young Temunjin rose to become the uniter of the Mongol peoples, the general who created the largest land empire in world history, and without a doubt forged his people into the most skilled cavalry of all time.