It's not like anyone has any expectation of decency from politicians anymore, but the big ones:
Donald Trump - too many to list
George W Bush - worst human being ever, Iraq oil war, used presidency to become a billionaire
Bill Clinton - Enemies get murdered and Lewinsky, Clinton money laundering foundation
Barack Obama - grifter that handed taxpayer money to banks and health insurance companies
The some scoundrels who kids are sold as heroes:
Tom Brady - impregnates girlfriend and then dumps her for a more desirable women
Tiger Woods - numerous affairs
Kobe Bryant - rape by sodomy and then pays off victim