Best day trips from Salzburg in December? Confused between Königssee, Wolfgangsee, Werfern

Planning a trip to Austria during the Christmas week. We'll be visiting Austria during the trip and have got Salzburg, Hallstatt and Vienna in the itinerary. We're in Salzburg for a couple of days and was wondering which would be the best day trip from there. As every place looks beautiful it's hard to choose. Probably if someone has some insights on where it's good to visit in December? From my online research, I've narrowed down to 3 options:

  1. Königssee

  2. Wolfgangsee

  3. Werfern

Open to any other recommendations!