No player can bypass the OS and output sound. At best, using particular output modes of the OS (like WASAPI exclusive or Kernel Streaming) or similar (like ASIO), the data path can bypass some layers of the OS. The OS does not by itself interfere with anything audio; interference (not the right term, but it'll do) is a side effect of the OS doing other stuff that it is meant to do by design and which it does.
Lowering the noise floor is not a function of a better software player. It is a function of tweaking the OS to not do things that it normally does and which are not required for an audio player to work. Or even if it does things, to do them in a way that audio is not affected negatively.