So it has been asked a few times on this challenge "Are there any ugly vampires?" Germany responds with a resounding "Ja!"
I give you the Nosferatu!
The "Nosferat" originally came from Central and Eastern Europe and described a beautiful vampire that was more akin to the Moroi. That all changed in 1922 when F. W. Murnau released his unauthorized version of Dracula on film called "Nosferatu, eine Symphonie des Grauens" or "Nosferatu: A Symphony of Horror".
Vampires had entered the cinema and the world was never quite the same.
The Nosferatu, Count Orlock played Max Schreck, was nothing like the vampires of today. He was ugly, had long rat-like teeth, was bald with pointed ears; in short he looked like the walking dead. He spread plague and death. Women did not fawn and swoon over him, they were horrified and repulsed.
So effective was this film that you can still see elements of it in modern day vampire films. Everything from the look of Radu in "Subspecies" to how shadows move in "Bram Stoker's Dracula" and countless others. The movie was remade in 1979 with Klaus Kinski in the title role and 2000s "Shadow of the Vampire" starring John Malkovich as Murnau and Willem Dafoe as Max Schreck.
In games the Nosferatu has taken on an unlife of it's own. It is one of the more iconic clans of the Vampire: The Masquerade game and it was one of the first vampire sub-species in Ravenloft.
Armor Class: 2 
Hit Dice: 9d8+9** (50 hp)
No. of Attacks: claw/claw/bite
Damage: 1d6+4/1d6+4/1d4+1 + CON drain
Special: Constitution Drain, Cause Fear, Summon Plague, Summon Rats
No. Appearing: 1
Saves As: F10
Alignment: Chaotic Evil
The Nosferatu is a subtype of the vampire. It is turned like a vampire and has all the same strengths and weaknesses.
Though the Nosferatu has a few additional abilities.
The Nosferatu looks pale, and withered. He also has almost rat or bat like look to him. His fingers and ears are elongated. A Nosferatu can never pass of anything other than the walking corpse he is.
Nosferatu can not turn into wolves or bats like other vampires, but instead can become a swarm of rats. Each rat of the swarm is part of a collective mind, so killing one will not destroy the creature. In fact even if all are destroyed save one the creature will reform.
Additionally Nosferatu can summon 10d100 (10-1000) normal rats to his aid or 2d20 (2-40) plague stricken rats (save vs. disease).
Like some vampires the Nosferatu can be held in place by a line of salt. A ring of salt around the Nosferatu will trap it.
Nosferatu are more sensitive to sunlight and will die with even the briefest exposure (1 round). They are effected by a Light spell as if it were Continual Light. Their vision in darkness is 180' and they see as well in complete darkness as humans can in twilight.
Nosferatu gorge themselves preferring not to waste time with luring prey. Once they attach themselves to a victim they will drain them on blood (Constitution points) till they are dead. A Nosferatu concentrating on feed (ie not in combat) can drain 3 points of Con per turn. In combat situations they can only drain 1d4+1 HP of blood per round, but they do not find this satisfying.
Nosferatu are all very strong (Strength = 18) despite their thin, corpse like visages.