How do you summarise the extraordinary life of a larger-than-life icon in a two-and-a-bit hour film? This is the inherent conundrum facing any biopic, especially those based around a musician. Focus solely on a few key “important” moments in their life, and you’re missing the quieter, simpler times that balance the scales. But attempt to cram everything in, and you run the risk of delivering something entirely shallow. You really do have to sympathise with any screenwriter tasked with this difficult feat. Then there are those biopics which seemingly...