Rabbit and Bilbo Baggins both seem ISFJ to me. And Gale strikes me as more NTJ or STP (though I wouldn't rule ESTJ out entirely). Besides that: no major objections so far.
Additions (and I'm not sure about a lot of these):
Walter Sobchak (The Big Lebowski)
Maria LaGuerta (Dexter)
Erika Berger (Girl With The Dragon Tattoo trilogy) -- edit: arguably ENTJ, since she seems a bit more detached than ESTJs usually are. Hard to know.
Lisa Cuddy (House)
William Riker (Star Trek: TNG)
Hermione Granger (Harry Potter series) -- arguably ISTJ but I like to claim her as my own
Both Captain America and Superman (depending on the iteration)
George Bailey (It's A Wonderful Life)
Beverly Crusher (Star Trek: TNG)
Donna Moss (The West Wing)
Blair Waldorf (Gossip Girl)