The fundamental forces/elements of the universe were their playthings.
And for what it's worth, they are among the select few in the mythos to be outright dubbed "omnipotent": (please log in to view the image)
-SW: Essential Atlas
"A great tactician creates plans.
A good tactician recognizes the soundness of a plan presented to him.
A fair tactician must see the plan succeed before offering approval.
Those with no tactical ability at all may never comprehend the plan, and will resent the tactician."
The Ones (Disney Canon)
Force Demons/The World Razer
Sith Gods like Typhojem though they're probably not canon in Legends
__________________ "Vader's pulse and breathing were machine-regulated, so they could not quicken; but something in his chest became more electric around his meetings with the Emperor; he could not say how. A feeling of fullness, of power, of dark and demon mastery -- of secret lusts, unrestrained passion, wild submission -- all these things were in Vader's heart as he neared his Emperor. These things and more."
Registered: Jul 2015
Location: The Darkest Corner of your Mind
1. Bedlam spirits [arguably they're above the force and can alter time and space; who knows]
2. The Father / Abeloth
3. The Father / Abeloth
4. The Son / Daughter
5. The Son / Daughter
6. Force priestesses? [assuming Bedlams don't count as force users]
__________________ No, Robin. I won't stop. Not now, not ever. I am the thing that keeps you up at night. The evil that haunts every dark corner of your mind. I will never rest and neither will you.
Father/Abeloth(Father was holding a realm consisting of countless stars together before collapse)
(Mortis FP Anakin, literally affected the entire realm of Mortis)
Force demons/World razer/TFB/Valkorian/DE Sidious/GM luke