AI, Face Swap
In my opinion, the face fit well, the only thing is that the oval of Cleopatra's face is not the same as Mona Lisa's, so if necessary, it can be edit it in Photoshop. You can pay attention that in the first photo AI even added the effect of cracked paint on the face like in the picture. Also, in the last image, Mona Lisa's face was made by AI with an effect optimized graphic image with loss of quality, although in the second image the face is without loss of quality.
In these images, the faces are also more or less successfully posed, you can further color the face to make it more similar to the joker, work on forehead wrinkles, mustache and hair color. Other images with face replacement do not always turn out well, depends on the angles of the photos. You can pay attention to how the AI correctly drew the cheeks, while keeping the original appearance of the person, his hairstyle, but added a mustache. The Joker has scars on his cheeks, but this is not understood by the AI. The oval of the Usyk's face, where the cheekbones are larger than the Joker's, that's why it's necessary to experiment more with other photos to get a better similarity or edit part of the image yourself.z Also, AI did not draw a diastema in Usyk, and it is good that AI does not know how to do it.