Peregrine_Bjornaer plays Bjornaer, a lot. He's made Cygna, with a swan heartbeast (of course). And then he has made one that actually has a bear heartbeast, Ankoydes. I'm pretty sure he has made others, and you could PM him if he has others that I couldn't remember. He stays pretty close to the core and Houses of Hermes books, for the most part.