Of those I contract with currently, none. Dahlver-nar was mad, but he was actually once a binder, before being tortured and killed by the Seropaens... Perhaps Malphas the turnfeather? Though he was just a traitor, not evil necessarily.

That's not to say some aren't evil, for example Chupoclops is one I've read of only in legend. I haven't yet fully transcribed his ritual, but his lore indicates he was some titan of some sort... Purportedly, the gods couldn't kill it, but mortals managed to. It was supposed to be an indestructible harbinger of end times, so the universe itself was confounded that mortals managed to destroy it, thus it became a vestige.