Do you know of some tools with a parameter that asks it to be "weird" and increase diversity of outputs?
If you want a chance for real creativity, flexibility and you have a decent gpu go local. Check out comfyui, download models and play around. The mainstream services have zero knobs to play around with, local is infinite.
If you ever had a pinterest account and a deviant art account, all becomes clear.
An more original prompt wont fix things. Modern base models want to eliminate everything that puts their creators at risk, which is anything that is clearly made by someone else, more or less accurately reproducible. If you avoid decent representation of any artist style, or anything/anyone that is likely to go to court, you wont get the chance of an creative synthesis either.
If you want something that looks original, you have to come up with a more original prompt. Or we have to find a way to train these models to sample things that are less likely from their distribution? Find a way to mathematically describe what it means to be original.