Completer is probably the same grape as Lafnetscha from Haut-Valais. It is a rare indigenous vine to the Gräubunden area. Used in the Valais and Grisons regions to make aromatic wine blends with some aging ability.
Auxerrois blanc
A clone of the prolific Pinot Noir, Auxerrois blanc is a close cousin of Pinot blanc. It comes from the county of Auxerrois, and is best known from Alsace.
Chasselas
In contrast to its native France where it wasn’t too successful as a wine grape, the Chasselas shines in Switzerland. Basically neutral in character, it reflects the nuances of the terroirs where it’s grown. Chasselas may be one of the first grape varieties ever cultivated and is one of, if not the dominant wine grapes grown in Switzerland.
And how's this for a description of the perfect wine? "It's like the perfect wife--it looks nice and is nice, natural, wholesome, yet not assertive; gracious and dependable, but never monotonous.