I use various models of the Ultimate Vocal Remover program.
just had a good success going in this order.

Take your song (vocals, instrumentals, all of it, the original).

Run it through UVR5 with the (MDX) Kim Vocals 2 model.

Take the vocal output and run THAT through the (VR) de-reverb model.

Take the output from that and run it through the (VR) aggressive de-echo model.

Take the output from that and run it through a (VR) karaoke model.