I know about the two above him if you want dragon (Equating Oryx directly to Khorne seems weird but)
Khorne
Khorne straight up is the concept of martial skill, combat, etc. Right off the bat it's already the culmination of all that across any possibility that did, is, never will exist, etc. In verse chaos is impossible to beat (besides Ynnead and Necrons I guess) due to this sort of thing, because trying to fight the concept of fighting just strengthens the concept of fighting because you feed into its nature. As such it's not really possible to outskill Khorne, because you yourself would feed into it and now it's just you + literally everything else. Chaos Gods fight amongst one another and khorne's less abstract manifestations sometimes have big sword made of universes so there you go for complaining about them not using swords or whatever
Oryx
Oryx is billions of years old, and has been fighting and destroying for most of that time. Lorewise every single one of his powers is part of what composes his symbolic (and therefore more true) sword because he's extremely powerful in the
Sword Logic. With this "sword", he can deny concepts, laws, causality, the existence of his opponents, all by asserting his own existence and cutting away that which is weak and deserves to be destroyed. He isn't bound to much of anything because he has become an existence that defines itself by using this Sword Logic.
Even with literal swords, he definitely used that thing a lot considering that some people (particularly his sisters) resist his powers. He fought them tons of times because that's how Hive show their love for one another, by trying to kill them. His sisters are bound to the concepts of war and cunning respectively. He defeated war at her own game, and when cunning tried to feint and kill him when he dropped his guard he outdid her there too, decapitating her as she was only beginning to pull out her knife. He's defeated his children (one of which, Crota, was thrown throughout time and space and in the process became a legendary demon and a figure of many myths, Humanity feared him immensely for how effortlessly he repelled an attack of thousands of Guardians on the moon cutting them all down with his sword that took their light), and the Vex that have simulation tech so potent that infinite multiverses are considered small scale compared to their full potential couldn't manifest a mind that could defeat him at the Sword Logic. Everyone he kills or Takes, he can take their skill too. This was how his sisters and he got so strong, by level grinding by killing one another all the time.
