Most of these came in the 70s and 80s. And in the 80s, his every discovery made a cover news in Time magazine.
That was one of the zeniths in Physics.
To balance off, he came up with not-so-correct theories too. Like the equation of the universe. These made a lot of headlines at that time. But didn't stand the scientific test.
Nice reading article, which isn't too technical.
http://www.bbc.com/earth/story/20160107-these-are-the-discoveries-that-made-stephen-hawking-famous
http://www.bbc.com/earth/story/20160107-these-are-the-discoveries-that-made-stephen-hawking-famous