From purely melodic point of view - Finland, Sweden
From "strangely awesome" point of view - Uruguay. It's pretty much an aria from an opera, lasts 6+ minutes (the longest national anthem in the world), the words are not sung until more than 1 minute into the anthem.
And nothing against Germany, but I always felt quite awkward when saluting to the Pitt Alma Mater - which, of course, *IS* the national anthem of Germany.