ISFJ camp! Let's see, Iceland is a very SJ country even though it may not seem like it. I see idols from there getting typed as SPs and NJs all the time despite that they are not like that at all. Yes, they're dreamy, but not that dreamy. You've got to remember Iceland is a country built on tradition, not fallacy or speculation. Everything they do is based off history. Parades. Sagas. Timeliness, you name it. Just because they're liberal doesn't mean they're not traditional. Si is retrofitting the past for future use. Ni is retrofitting the future for past use, and present use to some extent. That's why SJs are so creative. They know what works and they stick to it. They don't speculate. The more you stare at yourself in the mirror in the past, the more you'll notice. Iceland's just happens to have a colorfulness about it and a more liberalness to it because of their governmental system, which was pretty rockin' for the time. Notice how they've kept it all this time. If they were NJ inclined, they might have changed it to spice it up - because whatever. But they haven't, so that says something about their values and mores.
I'm saying this because Bjork's from there and a lot of Icelanders share the same values. They like community, but they also like independence. So if that had to be applied to a function, Si and Fe then. Both are community oriented. Si can be very independent when it wants to, especially since it's an introverted function - subjectiveness! And if you notice, even some of Jonsi's music is very past-oriented if very experimental sometimes. It all traces back to the Sagas and community orientation. That's just my two cents, though. (As an ISTJ, mind you.)