Lots of mainstream stuff here. Let's show some love for other things as well.
Sword of the Stranger - Final Fight
https://www.youtube.com/watch?v=rR1cMPnMcaY
Katanagatari - Final Fight
https://www.youtube.com/watch?v=DV1WtZreqQ4
Cowboy Bebop - Knockin' on Heaven's Door - Spike Vs Vincent, final fight
https://www.youtube.com/watch?v=wGjqU03ZmsA
Also, Spike vs Electra
https://www.youtube.com/watch?v=g_MsszLruro
Juubei-Chan
https://www.youtube.com/watch?v=U9n5Tbj9m3s