This is a modified workflow i found online, I added detailer's and it makes images that are light-years better then the other ones i tried. You can't make the Latent image size bigger then W/H 480, H/W 640 because it would mess up the image but at the end you'll get a image of W/H 2880 X H/W 3840. Below are the things i use in this workflow, Enjoy
qwen_3_4b_uncensored_aggressive
ComfyUI-Impact-Pack
person_yolov8s-seg
face_yolov8s