Donna Summer's versatile voice handled effervescence like “I Feel Love” as ably as it did gritty tracks like “Bad Girls,” making her a powerful force in dance music. Alchemists like Madonna and Rihanna showcase a similar versatility in their catalogs, which balance pop confections with harder-edged bangers; artists like Robyn and David Bowie, meanwhile, use electronic music as a way to push forward their art's human side.