Our infamous and rather large Ulysses Bloodstone profile. An immortal monster hunter who lived and fought for 10,000 years, with a bazaar of 1970s weirdness suffusing his bizarre biography. And he's very useful in stories, too.
A species of evil necromantic super-strong dragon-eating rat people. What could possibly go wrong ? These guys are from the classic Everquest MMORPG and come with full setting information, but could be useful almost anywhere.