Nano Banana is still at the top of the class but there are two fairly decent image editor style models that you can run locally - Qwen Edit 20b [1] and Kontext Dev [2].

[1] https://docs.comfy.org/tutorials/image/qwen/qwen-image-edit

[2] https://docs.comfy.org/tutorials/flux/flux-1-kontext-dev

Thanks!