Schwaller is swiss, but equally based in Munich and (now again) in Switzerland. He has several discs out on Joe Haider's JHM label: http://www.jhmrecords.ch/en/catalog/index2.php
I have the Nonet release "The Original Tunes" (and included a cut from a nonet live date on my BFT), and also the quartet disc "Some Changes in Life" which features Jimmy Cobb on drums.
Two very fine discs!
There is another quartet disc out, that I haven't heard, "Welcome Back from Outer Space", that has Mario Gonzi on drums, and the same pianist and bassist, Thomas Stabenow and Oliver Kent, respectively.
The "Three Generations" was out of stock when I ordered some JHM discs last time, and I haven't come around getting it yet.
Listen to Love Someone You Like
Some Changes In Live:
Welcome Back from Outer Space:
Schwaller also leads his own bi-annual festival, "Generations," in his hometown, Frauenfeld. The festival includes workshops for young musicians, who can study with some seasoned pros, who again will perform (rehearsed!) as the "Generations Masters Band" (2002 included Brad Leali, Don Friedman, Adam Nussbaum, George Mraz...). Also every edition features a festival big band, including the "Masters" again, plus otehr musicians (2000 had Bill Holman leading, 2002 Matthias Rüegg, 2004 Ed Partyka).
Here's the website: http://www.generations.ch/
Also you may be aware that Schwaller was a longtime member of Matthias Rüegg's Vienna Art Orchestra, and can be heard, for instance, on their great (but OOP) hatOLOGY disc "The Minimalism or Erik Satie" (the hatOLOGY was a reissue of earlier issues, btw).
That's about what I know. Like him a lot!
Oh, and I wouldn't call him a "swing stylist" - he's thoroughly modern, although quite in the mainstream (he wasn't on those VAO records).