I've been wanting to do something like this for a long time. It works reliably.

V.2 This version is trained differently, produces different results, and works with most checkpoints. See examples in the gallery. Please use Facedetailer for better face.

V.1: Supports 2 styles: Realistic and Comix_style

Use: Euler a or DPM++ 2M

And Adetailer for better Face.