For sure! First thing that comes to mind is that freshly vacuumed carpet texture. Doing a quick search on Pinterest I found something like this, but looking for a more stylized design and more detail in those nice lines from a vacuum, if you know what I mean. Would be really cool to have one with the vacuum lines and one without so we could potentially make materials that transition from one to another. For furs, I was thinking patterns or prints, like zebra, leopard, cow spots, etc that were more stylized. Sort of like this, but more stylized and cartoonish like your other textures. I don't know how complicated it would be in your workflow, but one thing that is super useful is a lot of color variations across all my materials, the darker a texture is, the harder it is to change its color, even though the other aspects are perfect. You did this really well with some of the wall panel textures that have varying brick colors and they are so incredibly useful.
I hope this helps get the creative juices flowing! Let me know if you might need additional examples. :)