Can I fit in some BIG company?

I’m an account graduate, not that fat to fit in any company. But there is one undeniable truth about me: I’m not good looking and suffer from a major inferiority complex whenever I go for an interview.  Even if I manage to find a job in some BIG organization, I still would always feel left out and unconfident. I’m searching for some nice job but am very conscious about my appearance.  Any solution?