Gintokipianist

depending on what instrumentation you like and what sytles you like i guess it varies alot, however as a classical pianist (and now a rocksmith enthusiast!) i can recommend chopin, as a piano player he is at least 50% of what you will ever be asked to play, for sort of "emotional/sentimental" music look for his nocturnes for crazy skillful and still great music i recommend listening to some of his etudes, such as https://www.youtube.com/watch?v=hnWo8PxrOR4