Rendering an actor after everything


Here is the situation:

I have a UI element that needs to be in 3D and at a very specific distance from the camera.
Currently it is colliding with some elements of my scene (obviously) and I am trying to find a way to render the actor after everything in the scene in order to not get this clash of mesh and have a clean render.

I cannot use translucent material.

I did not find how to modify the render order and I would like some help.
How does one can do that?

Thank you, have a great day!

Looking to the custom depth option as well as post render actor.