Rotating an object taking into account the main camera.

I currently have a script that depending on the joystick axis, rotates the object a certain way, I then send that rotation to the player and orient them on the direction this object is currently facing.

     private void Update()
     {
         h1 = OpenVRController.joystickAxis.x; // set as your inputs 
         v1 = OpenVRController.joystickAxis.y;
         transform.eulerAngles = new Vector3(90f, 0f, Mathf.Atan2(h1, v1) * -180 / Mathf.PI); 
         rotationAngle = transform.eulerAngles - new Vector3(90, 0, 0);
     }

The problem I have is that since I am using eulerangles, if I rotate the camera at all, the way the joystick rotates the object stops making sense in relation to the position of the camera (i.e, If I turn around and press forwards on the joystick, the object points backwards).

I tried using localEulerAngles, and it sorta accomplishes what I want, but since the object is attached to a VR controller, if I rotate the controller, it also rotates the object, which is a no go, since I also need the that the normal of the object I am rotating to stay upwards from the floor.

Is there a way to have localEulerAngles rotate the object while also orienting the object so that it is facing the ground? Or a way to change the script above so that it will take into account camera rotation too?

Thanks in advance!