I swear I saw a thread on this somewhere but I can't find it. I remember a post by glam about the character's types. I really hope I didn't imagine this.
Anyway I remember glam suggesting SLI for Salander and IEE for Blomkvist. And now that I have read enough of this and seen all the movies, I must say I really agree with these typings.
I don't have an opinion on the other characters who I have not focused on enough. In fact I ahem didn't bother reading passages that were not centered on one or the other of the above characters.