This is so brilliant! I admit I have soft spots for the first two movies, and you are totally right about their endings (or could-be endings).
My favorite, which I see didn’t make your list, is Legally Blonde. Probably because Elle gets rid of both the self-obsessed jerk of an ex-boyfriend and the creepy professor and wins an awesome new career and a successful, smart new best friend? She does end up with Luke Wilson, but eh, he’s secondary.