I’m not familiar with Shvarte Volf, Live from Stubbs or Soulfarm.
But I understand that because each person interprets experiences differently, the choice of music that would be considered subjectively “hartzedig” for any individual might vary along a broad spectrum.
I think that each person should determine which music/influence pushes him/her in the right direction -up- whatever that might be (within the acceptable standards of a LOR).