This hardly needs an introduction, so let's just jump right in, shall we?
1. Iron Man

Wounded, captured and forced to build a weapon by his enemies but instead creates an advanced suit of armor to save his life and escape captivity .
2. Thor

As the Norse
God of thunder and lightening, some may think he is an oafish imbecile but he is actually smart and compassionate. He will never stop fighting for a worthy cause.
3. Black Widow

Enemy turned ally to the avengers. She's an expert spy, athlete, and assassin trained by the infamous Red Room Academy.
4. Luke Cage

Known as Power Man. His super strength and unbreakable skin make him an impenetrable force to be reckoned with.
5. Spiderman

Bitten by a radioactive spider; he aquires great speed, agility and strength. Vows to use his powers to help people, taking down the bad guys in the process.
6. Hulk

Heroic doctor turned creature; the angrier he gets, the stronger he becomes.
7. Jessica Jones

After obtaining the ability to fly and super strength from a car accident she fights crime. Her abilities make her a worthy component in any fight.
8. Daredevil

Left blind after an accident with radioactive cargo, his remaining senses are heightened and he becomes a formidable fighter.
9. Wolverine

Born with super-human senses and the power to heal from almost any wound, he was given an unbreakable skeleton and claws. Once treated like an animal but has controlled his powers and uses them to fight crime.
10. Captain America

Took a serum to make him a one-man army. He vows to protect and serve the country any way he can.