2. Cillian Murphy (as the Thin White Duke)
When the mid-'70s reared up to swallow Ziggy Stardust, Bowie moved to LA and developed a prodigious cocaine addiction. While this new incarnation of the musician led to some disturbing pro-fascist rhetoric, it also marked his experimentation with soul and funk, and his injection of both into the pop sound he had cultivated.
Murphy, a gaunt and wild-eyed performer with roles including psycho killers and petulant criminals dotting his CV, would fill out the monochromatic ensemble of the Thin White Duke nicely and could channel the blow-fueled mindset that caused him to drown in his own self-mythologizing.