Opinion: Princess Leia’s Theme & Tales of a Jedi Knight/Learn About the Force are the best pieces of music in any Star Wars film.
At the risk of becoming this thread’s resident annoying shit, I will say that “Princess Leia’s Theme” as it appears on the soundtrack is a concert suite and not in any film proper (well, it gets sort of a play in the ROTS end credit). Still, it is an utterly marvelous and possibly the best single concert arrangement of Williams career. And I want to agree with your sentiments, but unfortunately more cues from the original keep popping up in my head that are equally magnificent.