There is an emerging party of religious-nationalist far-rightists under the acronym LAOS (the Greek word for people), which has tried to gain respectability by accepting the need for tough measures, but still stands to gain from the ferment.
Leave aside any attempt to leave the euro - even to do austerity plus default will be a challenge for the Greek government, and the West should not believe there are a bunch of apolitical technocrats, or competent centre rightists just waiting in the wings.