Poor Hungarian, Andrew S. Grove, came to the United States in 1956 at the age of 20. He went on to become one of the founders and CEO of Intel Corporation. From Wikipedia:

Intel Corporation is an American multinational semiconductor chip  maker corporation headquartered in Santa Clara, California, United States and the world's largest semiconductor chip maker, based on revenue.^[4] It is the inventor of the x86 series of microprocessors, the processors found in most personal computers.

From Grove's faculty profile on the Stanford website:

Dr. Grove has written over 40 technical papers and several books, including Physics and Technology of Semiconductor Devices, as well as High Output Management and Only the Paranoid Survive. He has received a number of honorary degrees and other honors. He was named Time Magazine's "Man of the Year" in 1997, and received the IEEE 2000 Medal of Honor, and the 2001 Lifetime Achievement Award from the Strategic Management Society. In 2004, he was named the Most Influential Business Person in the Last Twenty-Five Years by the Wharton School of Business and the Nightly Business Report.

He chaired the Campaign for UCSF which raised $1.6B, and has been active in cancer and neuroscience research through his private family foundation. His current interests also include energy policy.

You can read more about Andrew Grove in his biography, "Andy Grove: The Life and Times of An American."