John Dickinson

On Founding Father John Dickinson, the only delegate not to sign the Declaration of Independance, from Wikipedia:

In 1777, Dickinson, Delaware's wealthiest farmer and largest slaveholder, decided to free his slaves. While Kent County was not a large slave-holding area, like farther south in Virginia, and even though Dickinson had only 37 slaves, this was an action of some considerable courage. ...

While there, in October 1781, Dickinson was elected to represent Kent County in the State Senate, and shortly afterwards the Delaware General Assembly elected him the President of Delaware. The General Assembly's vote was nearly unanimous, the only dissenting vote having been cast by Dickinson himself....

On November 7, 1782 a joint ballot by the Council and the Pennsylvania General Assembly elected him as president of the Council and thereby President of Pennsylvania. But he did not actually resign as State President of Delaware. Even though Pennsylvania and Delaware had shared the same governor until very recently, attitudes had changed, and many in Delaware were upset at seemingly being cast aside so readily, particularly after the Philadelphia newspapers began criticizing the state for allowing the practice of multiple and non resident office holding.