George John Mitchell – Age 87

After serving as a senator, George Mitchell focused on diplomatic roles. Former President Bill Clinton tapped him to be the United States Special Envoy for Northern Ireland from 1995–2001. Then, former President Barack Obama appointed him to be the United States Special Envoy for Middle East Peace starting 2009 to 2011.

Although Mitchell has largely stayed out of the spotlight in recent years, he made the news in August 2020 after it was revealed that he was diagnosed with leukemia. As per reports, he started with the treatments after he turned 87.