I have uploaded several workflows for SDXL, and also for 1.5. They include SDXL styles, an upscaler, face detailer and controlnet for the 1.5 workflow.
Feel free to try them out, and I'd appreciate any feedback you have, so that I can continue to improve them. I am constantly making changes, so please check back regularly.
https://civitai.com/models/119257/gtm-comfyui-workflows-including-sdxl-and-sd15