@The_Ellimist
That showing proves nothing significant in the context of power and performance in combat.
Force-users influence the balance of the Force more then anything else.
More than any others, it is the Force-sensitive beings of the galaxy who have the greatest influence upon the balance of the Force.
From Star Wars: Force and Destiny
The balance of the Force would shift depending upon the actions of the Force-users throughout galactic history.
For this reason, some believe that the Jedi and Sith must share an ultimately common origin, and their creation in the distant past embodies the opposition between the light and dark sides. As their relative power has increased or diminished over the centuries, it has only reinforced another deeply held belief about the Force: that it has a balance, and that this balance can shift over time.
From Star Wars: Force and Destiny)
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The Force was omnipresent. It radiated stronger in certain places and at certain times, and the balance of the dark side and the light constantly shifted.
From Star Wars: The Old Republic: Revan
Valkorion is also implied to be among the sources disturbing the balance in the Force.
“The Force always strives for balance. The Emperor is an agent of darkness and destruction. It is inevitable that a champion of the light will one day rise to oppose him. I may be that champion.”
From Revan, Star Wars: The Old Republic: Revan