colombia
According to the United Nations Office on Drugs and Crime (UNODC), Colombia is the largest exporter of illegal cocaine in the world. It is estimated that around 70% of the global cocaine supply originates from Colombia.
Australia is the largest exporter of coal ~ see related link below .
The United States is currently the world's largest phosphate exporter.
Chile is the largest exporter of copper in the world.
Russia
Japan
Bangladesh
Indonesia
I assume you mean exporter. The second largest exporter of coffee is Colombia.
Saudi Arabia
India
United States
Chile