My argument:
1. Valkorion lost to four people:
https://m.youtube.com/watch?v=FbTdLy3xO3E
2. Savage Opress is more powerful than the entire Jedi Order:
However, Dooku and Asajj Ventress discover that their creation has a will of his own, and that he has grown more powerful than either of them had anticipated – perhaps even more powerful than the combined forces of the Jedi and the Sith.
The Official Star Wars Website (2011)
Savage > Valkorion
3. Sheev one-shot Savage with a kick:
http://www.youtube.com/watch?v=-7hBZNsPnyg&t=2m40s
Therefore: Sheev can one-shot Valkorion with a kick