This movie is easily in my top 5 movies of all time, i have seen it so many many times
Good, you probably know the characters better than me.
Korben Dallas: ISTP for sure
Yes, He's totally ISTP! He'has the ISTP humor. I love the running gag when Ruby makes a long and delirious show and Korben say just ONE word when it's time for him to talk, and then, brutalises Ruby for he leave him alone. What other type can act like that?
The perfect girl, an ISFJ? Yeah, I can see that.

I've mistype her as xSFP because she's fun, but she's actully ISFJ: sensitive, caring, studious, competent, caring,dynamic, pysically oriented, smart, loves fashinable clothes, loves social ritual ("Leeloo Dallas, moultipass!"). And looks like some others ISxJ I'm curious to read your argument though.
His assistant: INFP (he is not an INFJ lol)
Ok for INFP, but I think the Diva Plavalaguna is INFJ her.
Ruby Rhod is so eccentric that I've believed he's an N, but he's actually a sensor. He's the caricature of some ESFP I know, and the way he flirts is totally ESFP.
Yeah, Ok. I can see the general Staedert as ESTP too, but I hesite with ESTJ.
I think the president can look like an S because of the Te's need for data, but I say rather ENTJ for him because he prefers solve problems rather than etablish procedures. The Korben's mother is an ESTJ her, lol!