Fly into Geneva > Montreux 3 nights > Wengen 4 Nights > Zermatt 2 Nights > Luzern 3 Nights > Fly out of Zurich
From Montreux you experience French Switzerland with the amazing castle Chateau de Chillon, the Lavaux vineyard terraces built by monks 1000 years ago and still in use today, with optional day trips by boat to Yvoire, France, etc.
From Zermatt you can take the scenic Gornergrat train up to see the Matterhorn + explore the historic car free village
From Wengen, a car free village up in the alps you can explore the mountains via cable car (Mannlichen, Schilthorn, etc), walk the Lauterbrunnen Valley with waterfalls everywhere, take a boat ride on Lake Thun with castle stops at Spiez, Oberhofen & Thun + do some light hiking/walking around the car free villages of Mürren & Gimmelwald
From Luzern you can explore the historic center + the historic Musegg Wall, take a scenic boat ride to Fluelen, visit Bern, visit Lugano/Morcote to experience Italian Switzerland or do mountain viewpoints up at somewhere like Mt.Rigi
Do this all by train/cable car. Routes can be found on the official Swiss transportation site SBB.ch/en - once you confirm you’re visiting Switzerland come back here for questions on transportation, train passes, hikes, sites, etc.