Isn't Torcleaver the same exact animation as Ground Strike, just with a different graphic effect? But the 3D model animation is the same I think.
Similar to Blade: Ten and Blade: Hi, or Howling fist/Ascetic's Fist/Final Heaven, then Tachi: Kaiten/Tachi: Koki etc etc.
It's the same pattern. Many WS share the same 3D animation but have a different graphic effect.
When it comes to animations I think many (most?) of the Merit WS are very cool, arguably the coolest WS in game regardless of race.
If we're talking about old animations, my choice probably goes for Asuran Fists. Galka version for "sense of might" and Taru version for "spectacularity" with the final sommersault jump.