What is a realistic example of a fictitious character with BPD?

Rachel Griffith from Six Feet Under.

That character is an unbelievably accurate representation of what somebody with BPD is actually like, including the backstory (the child-prodigy who, so it was hinted, was molested and otherwise violated by her amoral and self-serving parents).

Notice that her brother is also damaged, albeit differently, corresponding to the fact that genetics influences trauma-vectors.