I agree with kiwi in #4. You have to define for yourself the word "hero." Many people have many different ideas, and one man's hero is another man's enemy or villain, as the popularity of Osama bin Laden in certain circles shows. For me, heroes are people that make a noble and valiant stand about an issue that they believe strongly in, and are willing to make massive sacrifices themselves for that end. Ang San Suu Kyi for me is a hero, in the way that she has fought for freedom from tyranny in Burma.
A clear definition of what a hero is to you is a good starting place to help you make your own selections. I choose to define heroism as someone who puts others before themself to make a difference. My heroes would be Rosa Parkes and Martin Luther King for their huge contribution to worldwide tolerance and understanding. In another way, I also see my parents as heroes as they made great financial sacrifices to help me through University so I could become a teacher.
I have many heroes. My father is one. A former infantryman who was wounded during the Battle of the Bulge during World War II, he later was credited with saving a man's life while on the job. Working as a serviceman for the local electric company, one of his co-workers touched a hot wire and was in the process of being electrocuted. My father, who was also on the same electric pole some 15-20 feet above the ground, dove for his friend, tackling him and tumbling together to the ground. It was a brave act, risking electrocution and death himself.
Aside from my father, I admire William Shakespeare, Edgar Allan Poe, Robert E. Lee, Mickey Mantle, Johnny Unitas and Steve Spurrier, among others.
If this question is about you, you will need to answer for yourself since people have different reasons for having heroes and no one else's answer would necessarily make sense for you. If the question is meant to see who other people see as heroes, here is my answer:
To me, heroism is hard to define. We tend to see it however, as being connected to self-sacrifice for a worthy cause. Looked at in this way, my heroes would be those who give of themselves to help others. Of course, many people do this in many ways all the time. Therefore, we tend to focus only on the people who do so in very conspicuous ways. I suppose that the person I see as most heroic in recent times has been Mother Teresa who essentially spent her whole life helping others. I also admire a person like Bill Gates who has put so much of his wealth towards improving others' lives.
However, I do not see anyone as my "hero" in the sense that I wish I were like them and I "worship" them. I think that I have grown too old and cynical to have heroes in that way.