There are actually several stealthy pretenders. Unicorn-riding Arch Druid (many nations), Master Druid, Partholonian Sorceress and Mother of Tuathas (Man etc only), Vampire Queen, Ghost King, Lord of the Wild (Panagea only), Anansi (Machaka only - oops, that's my mod!
), Son of Fenrer (Jotun only), Allfather (Vanheim only), Lord of the Night (EA/LA Mictlan only)... But as you can see, only Ghost King and Vampire Queen are universally available. Most others are limited to Nature nations or glamour nations, with few exceptions.