2 Dr. Dre
Rapper, record producer, and audio engineer, Dr. Dre, is the founder and CEO of Aftermath Entertainment and Beats Electronics. He is credited with the popularization of West Coast G-funk, a sub-genre of hip hop. After establishing himself in the music industry, he promoted the careers of many other rappers, including 2Pac and Snoop Dogg.
Ross Perot was the founder and CEO of Electronic Data Systems and Perot Systems. He received the Distinguished Eagle Scout Award and developed the Naval Academy’s honor system. He ran for president as an independent candidate and then established the Reform Party. He sold Perot to Dell for $3.9 billion.
4 Tim Cook
Alexander Graham Bell was a scientist, inventor, and engineer. He is credited with inventing the first functional telephone. He is also credited with co-founding America's major telephone company AT&T, which has been going strong since 1885. Bell's later life was marked by his groundbreaking work in aeronautics, hydrofoils, and optical telecommunications. He was also an ardent supporter of compulsory sterilization.