my knowledge of werewolf lore is pretty much limited to DS but to me much like zombies he's a pretty lame monster.
at least in terms of DS the vampire and the witch and the pheonix bring several things to the table. not just physical threats but emotional,psychological,sexual and spiritual implications are at stake as well.
sure barnabas,angelique or laura could just kill you right off the bat but the myriad other tortures they inflict on their victims are often worse than a quick and easy death.
with a werewolf(or,again,a zombie)either they attack you or they don't. they pose a physical threat but that's about it. their victims don't become changed in some profound way and thus for me they're not really "scary" except in a b-movie kind of way.
sure chris jennings is "tortured" my his condition(and put sabrina stewart into a catatonic state)but his actions under the werewolf state don't pack the emotional punch of many of the other supernatural characters.