Copy the good qualities. Learn from and ignore the bad ones.
Just be yourself. You don't really have a choice in the matter. You are you. You can only be you. If you try to graft aspects of somebody else's personality onto your own, you will find that it's a rather futile effort. You can't. Find out who you truly are, discover yourself, and then embrace yourself in the fullest sense. You can be a better you, but you can't be somebody else. If that means you don't end up a minor celebrity, c'est la vie.
Please justify the above statement. How could you possibly know that? What is to say that these people would not have gone to achieve even greater heights if it had not been for their bad qualities? There is something incredibly depressing about this attitude that pretty much states that it's okay to be a complete and utter jerk if you have achieved some level of success. Maybe it's cool to say that because it's counter-cultural thing or maybe we as a society have reached a state where people have a knee jerk tendency to apotheosize those who are successful and explain away their flaws as somehow critical to their success (also read the Mark Pincus stuff to further observe this phenomenon). Either way it's depressing.
Then again, maybe not. Petulance isn't the worst thing a person can be. If that's the character flaw somebody clings to in their old age, they're probably not entirely bad. Screwing over Woz was much worse, but he was in his twenties, and twentysomethings barely count as human beings. (I say this as a twentysomething myself.)
Please provide an example of a single billionare or minor celebrity who isn't an asshole. The fact that you can't is evidence enough.
> There is something incredibly depressing about this attitude
What is really depressing is that you feel your life isn't worthwhile unless you are incredibly "successful" and you define success as being filthy rich or being a minor celebrity or really a clone of Steve Jobs/Bill Gates/Larry Ellison/etc. I know myself. I know that I don't have the qualities necessary to be that and knowing that has relieved me of any desire to have that.
More than that, that single realization has allowed me to focus on the qualities I do possess! It has allowed me to become a more supportive leader. My team will never make the next google.com or iphone. That's ok. Instead, they'll have families and they'll spend time with them. They'll do amazing work! Just not on a scale that will earn me billions. That's fine by me!
What about Warren Buffett?
It is very easy to trash another person. As an example, see http://en.wikipedia.org/wiki/Warren_Buffett#Personal_life and see the wonderful letter he penned his grandchild.
That's not the point.
The point is that all of my experience tells me that you really have to be an asshole and stand on the backs of others to get that far. Nobody is born nor becomes such a savant that people shower you with billions of dollars. You have to be smart, devious, aggressive, and abrasive. That just isn't me. It's not you either. That's OK.