Best model to use as a base for img2img?

Hey. I make images with illustrious, and it can hardly create difficult pictures than "1girl". But at the same time it has superior aesthetic and anatomy. So I want to generate base image with some complex scene / concept - and run it through image to image, or maybe even create depth map of it and use controlnet. So the question is, what kind of model should I use? Aesthetically it can be very bad, I just need it to generate what I ask it. Being able to tweak body proportions at least to some extent is welcome too. I did not try any of the new models like wan, qwen, flux, etc.