Well, according to the Christian angelic hierarchy, seraphim / seraph are the highest order of angels there is.
"Seraphim (singular "Seraph"), mentioned in Isaiah 6:1-7 are the highest angelic class and serve as the caretakers of God's throne and continuously shout praises: "Holy, holy, holy is the Lord of hosts; the whole earth is full of his glory!" According to Isaiah 6:2, the Seraphim have six wings: "with two he covered his face, and with two he covered his feet, and with two he flew"."
Only God would be higher than that.



