Can anyone point to another story in which a similar group of protagonists exist, let alone fights the Empire?
The only thing that I could see that makes them "cliche" is "this describes every Star Wars RPG group I've played in."
Does Firefly count?
Admittedly for them the war is technically over but the movie showed there was still resistance!
Starchaser the Legend of Orin?
Luke alike character the Han character is more mercenary with a love interest in a captured human female similar droid, the feisty daughter of a noble don't remember the rest except for the sword thats apparently psionic in nature!
Hmm I wonder if the Last Starfighter would work in a Star Wars game...?
Is Power Rangers excluded on grounds the Empire never lasts long enough to be relevant?
I'm not sure if you are referring to the OT characters or the characters in Rebels (which is what we are talking about).
As far as Firefly, other than the fact that it is a disparate group of characters on a ship, there really aren't that many parallels if any at all.