Among Group 16 elements, which one does NOT show $-2$ oxidation state?

As we move down Group 16, the metallic character increases and electronegativity decreases.Oxygen ($\text{O}$), Sulfur ($\text{S}$), Selenium ($\text{Se}$), and Tellurium ($\text{Te}$) commonly show $-2$ oxidation states.Polonium ($\text{Po}$) is a metal and is highly electropositive compared to others. It shows $+2$ and $+4$ oxidation states but does not show $-2$.