John Carpenter (born c. 1968) is an American game show contestant and IRS agent. He is best known for becoming the first top prize winner on the United States version of Who Wants to Be a Millionaire. He held the record for the largest single win in United States game show history, until it was broken by Rahim Oberholtzer who won $1.12 million on another U.S. quiz show, Twenty One. Carpenter was also the first top prize winner among all international versions of the Who Wants to Be a Millionaire? series.

Answer this question based on the passage: who was first winner of who wants to be a millionaire? Let's have some stream of consciousness first.
The relevant information is: He is best known for becoming the first top prize winner on the United States version of Who Wants to Be a Millionaire. So, the answer is John Carpenter.