Iron Man (Marvel)

"Everything I've done, everything I'll do today, everything I'll ever do, I do to protect this world. Someone once told me that with great power comes great responsibility. That's usually thought of as a lesson for children. A simple injunction to do the right thing. But there's nothing simple about it. When I put on this armor, I took on more power than any human was ever intended to have... and maybe more responsibility than my heart can truly bear. But today... I will do my job. I will protect you. No matter what it takes..."

- Iron Man

Tony Stark/Iron Man is the main protagonist of the comic by the same name. Stark: an inventive genius, industrialist, and multi-billionaire, went to Vietnam to oversee a field test for one of his transistorized weapons, that his company-Stark Industries made. While there he accidentally stepped on a bobby trap, and a piece of shrapnel became lodged in his chest. Injured, Stark was captured by Communist forces under Wong-Chu, and made a prisoner. While in prison, Tony created a mechanical suit of armor so that he could escape, as well as using his technological know-how to create a pace-maker like device to keep his heart beating and thus, Stark could stay alive. Using the Iron Suit, Stark was able to escape the Communist forces, and once back in America, he perfected his work, making a practically invincible iron suit much like he has today.

Powers
Although Tony Stark himself doesn't have super powers, his armor gives him enhanced strength -allowing him to lift up to 100 tons- as well as flight via rocket boots. His armor is also equipped with the most advanced technology and weaponry to give him an advantage over the mega villains he battles.

Trivia

 * Iron Man also appears in Marvel Cinematic Universe.