elder statesman 
noun
An experienced and well-respected politician or other public figure: he is the president everyone loves to cite as the model elder statesman an elder statesman of the turf...
- I try to model myself on the elder statesman of Maori in this House, and to follow the way he performs.
- His is presumably a view of the outsider looking in-now a declared political observer, an elder statesman and senior citizen.
- He carried on in this function as a Special Representative of the EU, while remaining influential in Spanish politics as an elder statesman.