While he's not ECM, I'm mostly into Scandinavian jazz. Svein Olav Herstad is a great musician, a few months ago I ordered one of his albums, since this is only available in Norway it was really expensive but the folks running the music label responded to my emails and were really kind, furthermore, I send Olav Herstad a friend request on Facebook and he accepted it. I'm still trying to obtain of all his CDs. On this one I recommend the song "Alto Acres".
Jazz Pa Svenska is a classic album in Swedish jazz, I still haven't found a (reasonably priced) copy of this but I know I'll order it sooner of later.
There's also the Esbjorn Svensson Trio which combines rock and jazz music into an exquisite blend.