Neil Barofksy, former Special Inspector General for the Troubled Asset Relief Program (SIGTARP). Read more here.
Sen. Sherrod Brown (D-OH) who in 2010 introduced an unsuccessful bill to limit bank size. Read more about the secret $13 billion in loans the Fed gave to the top banks on Wall Street.
An anonymous warning email about United Commercial Bank, which later received $299 million in taxpayer money as part of the TARP bailout and soon began to fall apart. Read the story of the bank and the unheeded warnings at ProPublica