Any self-respecting Goth should know Edward Gorey, the famous artist. Lots of non-Goths should also recognize his work, most prominently featured on PBS's Mystery. He had such a macabre sense of humor, and yet....he was a big animal lover.
The Edward Gorey House and the Edward Gorey Charitable Trust support the Tufts Veterinary School, Bat Conservation International, the Animal Rescue League of Boston, and the Xerces Society.
Here's a short article about him and here's a link to some of his work.