Anyone can make a concept album (which is not to say that it’s easy, but that it doesn’t depend on a particular musical style). That said, when it comes to the rock-opera-style concept album, the tendencies towards elaborate instrumental explorations and grand, dramatic spectacle often found in progressive rock and metal, provide particularly fertile ground. Pink Floyd, Queensryche, The Who, and many others have followed this path (coloured by their own particular musical approaches).