Good points.
I'll probably make a very old and exceedingly military-minded vampire knight who has became very excited with idea of playing soldier in the past sixty years, WW II and all. A vampire is extremely strong, fast and durable, doesn't need to breathe and has literally no needs to satisfy other than the thirst for blood, right? That means a vampire can carry ten times as much hitech armor as a normal infantryman can without any hindrance, swing a massive silvered sword one-handed and wield a flamethrower in his other hand without any fear of getting burned thanks to his armor, all to better slay anyone he can manage to without breaching the Covenant. Maybe a legendary mercenary somewhere in south america or a wildcard motherfucker feared and disliked by the rest of the vampire community due to prospensity for showing up and murdering absolutely everyone whenever there's a clan war going down?