Additionally, if the sprite is just an image, the TextureRect might work. It extends Control, so you have all of the ability to edit it as needed, but it can also display an image. You can change the texture using something like $TextureRect.texture = load("res://texture_path_here.png").
Though I agree with @cybereality, in that having a formation for the nodes and how you will need them will help, regardless of whether it is in the editor or through code.