Name That Commencement Speaker

We've pulled ten quotes from past commencement speeches—can you figure out who delivered the remarks?
1 of 10
“Truth be told, I never graduated from college. This is the closest I’ve ever gotten to a college graduation.”
Steve Jobs
Bill Gates
2 of 10
"I'm not advocating that you all go out and dye your hair so that you can play the jerk in a really stupid Adam Sandler movie. I don't know what kind of an idiot would think that is a worthwhile way to spend their life."
Bradley Whitford
Norm Macdonald
3 of 10
"The people of this country are distant from the troubled areas of the earth and it is hard for them to comprehend the plight and consequent reactions of the long-suffering peoples, and the effect of those reactions on their governments in connection with our efforts to promote peace in the world."
George Marshall
Donald Rumsfeld
4 of 10
"I regret that [my grandmother] didn't live past 1963 and see that I did grow up and get some really good white folks working for me."
Oprah Winfrey
Bill Cosby
5 of 10
"Somewhere out in this audience may even be someone who will one day follow in my footsteps, and preside over the White House as the President's spouse. I wish him well!"
Hillary Clinton
Barbara Bush
6 of 10
"Through the years, one by one, I have written a barrel-full of songs…I wished to be a songwriter, and I attached my work to my wish and that wish came true."
Mr. Rogers
Regis Philbin
7 of 10
"Don't get me too excited because I use four letter words when I get excited. I'd just like to say to the parents, your children are safe, your country is safe, the FCC has taught me a lesson and the only four letter word I'm going to use today is PENN."
Don Imus
Bono
8 of 10
"I am honored to be here and to receive this honorary doctorate. When I think back to the people that have been in this position before me, from Benjamin Franklin to Queen Noor of Jordan, I can’t help but wonder what has happened to this place. Seriously, it saddens me."
Conan O'Brien
Jon Stewart
9 of 10
"A huge percentage of the stuff that I tend to be automatically certain of is, it turns out, totally wrong and deluded. I have learned this the hard way, as I predict you graduates will, too."
Dave Eggers
David Foster Wallace
10 of 10
"Wear sunscreen. If I could offer you only one tip for the future, sunscreen would be it. The long-term benefits of sunscreen have been proved by scientists, whereas the rest of my advice has no basis more reliable than my own meandering experience. I will dispense this advice now."
Kurt Vonnegut
Someone Who Sounds Like Kurt Vonnegut