Schaechtentaller Windgallen is good so long as you can downclimb some tricky spots and the chute is not too tricky.
Other worthy objectives in the neighborhood:
Toedi/Piz Ruessein - Need to go down to Andermatt then on the road west to start the walk-in at Trun. Probably advisable to overnight at the Camona da Punteglias Hut instead of blasting on. Big crevasses but since you are going in Sept, the glacier will be dry
Glaernisch ...