I'll add them:
Blue Vortex / Rumble Pack
Also well-known, at least here. One album out.
Schädelleuchten
Very cool sound with melodic guitars, one album out.
Freakulizer
Project from DJ Thujon, several tracks on comps and one new album out.
Goma
Some tracks on compilations.
Sun Collector
Some tracks on compilations, they used to use didgeridoos and other live instruments but I don't know how they sound today.
Dex
Makes nice melodic music, one track on a Woodroom compilation (Swiss label)
Subconsciousmind
One album out on his own little lable (very independent). VERY GREAT music, I tell you!
Woodroom Records
Small Swiss label with three comps out.
XV Kilist
Progressive act, at least one album out (I'm not into progressive so I don't have a clue what's going on).
Engelspost
More on the housy/progressive side, some tracks on comps, some vinyls and a official remix for a Peter Gabriel track.
Dancing Devil
One album out, very energetic music.
DJ Muestik
I guess he is one of the most famous DJs from Switzerland. I don't know if he has tracks on comps but I know he is producing stuff.
Sonnenvakuum / Sonic Cube
Thanks Prosect...
Peaking Goddess Collective
Thanks Moni!