It's a good idea to include signature, watermark, patreon, artist name in the negative tags. I can't guarantee that this will remove the signature, but it helps.

Nothing impressive, to be honest. Just an experiment—creating a Lora of this artist—but this time focusing on his drawings that highlight the feet.

I also took the opportunity to try out a new tagger focused on furries. As you can see from the example images, it tags a large number of items.