A workflow i use and can get some good results with... so im posting it here.

I should also mention that i use an AMD RX 6600, so no big and fast images for me!
(you can adjust the image size and how much it upscales if you have a GPU that is better suited for image generation)

Please use ComfyUI Manager: https://civarchive.com/models/71980/comfyui-manager
to install all custom nodes used in this workflow (its useful for downloading other custom nodes if you plan on using different workflows that require you to download 10 different custom node packages)

Custom node links, just in case:
https://github.com/ssitu/ComfyUI_UltimateSDUpscale
https://github.com/diontimmer/ComfyUI-Vextra-Nodes