Here is a simple, functional workflow for beginners in ComfyUI who wish creating realistic portraits with SDXL.

I don't claim to revolutionize anything, maybe you have better, but this is the kind of workflow I would have liked to have had when I started on the UI.

You don't need several ressources or a lot of nodes, just a good checkpoint and maybe one or two optional LoRAs.

It works with EpicRealism : https://civarchive.com/models/277058/epicrealism-xl
But you can try another realistic checkpoint (RealVis, Juggernaut).

Upscaler : https://huggingface.co/uwg/upscaler/blob/main/ESRGAN/1x-ITF-SkinDiffDetail-Lite-v1.pth

Check the note in the workflow and play a little with the parameters, and especially the prompt.

To go further and if you have the know-how, a little inpaint sometimes on the eyes or a detailer can do good.

Enjoy !