Who is the god of balance in DND?

Argentahl is a god of balance and justice. He rarely intervenes in mortal affairs, but he does grant divine rewards to those who seek to preserve the balance. Argentahl’s avatars tend to appear on the material plane. If one does travel to another plane, the area around them becomes balanced, like the material plane.

https://www.dandwiki.com/wiki/Argentahl_(5e_Deity)#:~:text=Argentahl%20is%20a%20god%20of,balanced%2C%20like%20the%20material%20plane.