georg ebner says that Alexander VdB would be the first one if elected in 2016.
I'm thinking about presidents more than prime ministers (of which there might have been some).
A sensation in the PRESIDENTial election of 2016 is possible (at least now): The first GREEN head of state worldwide!, as Gallup polls (for www.oe24.at) prof. VanDerBellen with 39, the likely FPÖ-candidate with 9 and two imaginable candidates - Leitl/ÖVP and Bures/SPÖ - with 29 and 20.
https://uselectionatlas.org/FORUM/index.php?topic=180261.msg4350786#msg4350786