Fuck that 'classical' 1800s shit or whatever that people will inevitably bring up. rap is the only music I listen to when studying, and the only music i listen to at all.
drop beethoven and instead cop XXXTentacion. A 19-year old Soundcloud rapper (yeah I know what you're thinking) that's basically a mix between Beatles, Beethoven, Queen, Kendrick Lamar, and whatever other artist only white people listen to, but on steroids.
Incredibly underrated and talented (he's unfortunately been in jail these past few months for beating his pregnant girlfriend and robbery.)
Give a listen to his best hits: Look at Me! (has 64.8 million plays according to soundcloud btw), SippinTeaInYoHood, What in XXXTarnation?!, Vice City
It might seem strange at first, in fact more of a joke, but as you'll listen you'll realize this dude is pushing the boundaries of hip hop like Kanye back in 04. X will blow up once he drops a proper studio album (which is actually happening this year).