How about Queen? Elvis Presley? Frank Sinatra? (Okay, Sinatra is kinda old...)
darkgalaxy30 I've read somewhere instrumental music is good to calm and focus the mind. The article also mentioned most video game music is very useful to play while studying.
So, apart from my useful playlist filled with classics I have a playlist purely for studying. Works great and really calms the mind. (Just make sure you're listening to calm music.)