Cynthia Cooper
Cynthia Cooper exposed corporate misconduct in the infamous WorldCom scandal paving the way for the enactment of the SOX corporate reform law.
Cynthia Cooper exploded the bubble that was WorldCom when she informed its board that the company had covered up $3.8 billion in losses through the prestidigitations of phony bookkeeping.
In recognition of her whistleblowing, Cooper (along with Sherron Watkins and Coleen Rowley) was named Time Persons of the Year in 2002.