William Lane Craig’s latest illustrated argument for God’s existence takes up the ontological argument. This is quite a controversial argument, and many theists ignore it. I must admit, I don’t use it myself. It’s not because I don’t think it’s sound, but because it is so philosophically esoteric for most people to grasp, and because it is so nuanced. Nevertheless, WLC has done a nice job helping people to better understand the argument through illustration.
For WLC’s other illustrated arguments, see: