For example, a band like Joy Division. Two masterpiece albums in the form of Unknown Pleasures and Closer, and the untimely death of Ian Curtis cut it all short. They were even heading into the direction that New Order eventually went in, and it would have been interesting to see what Ian Curtis would have done if they fully made the leap into electronic music while he was still alive.
Fully expecting no one in this thread to ever have heard of them: Made in heights Love their music. Unfortunately the duo got into a nasty fight about rights and royalties and split up. They’re only really available on YouTube anymore.