Vader's Redemption: The Imperial March in a Major Key

Though you asked for an example... but maybe its best to show a counter-example instead? Here's the Imperial Death March played in a Major-scale, instead of a minor scale. this video If everything was in an 8-note (no accidental, transpositions only) measure, they'd sound like "Vader's redemption". To sound sad, you MUST shift to a minor key. A minor key has sharps and flats to create tension. Any "sad sounding" song cannot be properly played in a major key.

The canonical video on the subject: link Some people will naively say "All music has pentatonic! Universal!" but ignore vital cultural context. One example in the video is ragas: they can look a lot like Western scales and modes, but they have a time and context. Western music also has a time and context, but it doesn't stand out as much to us unless someone goes full ham breaking that context like with the Imperial March in a Major mode: this video It changes the mood from "this is the bad guys!" to something more positive and triumphant.