There are different versions of the Vampire depending on the culture you explore, even in europe depending on the subregions. Its the same with things like the Zombie which has its origins in Haitian voodoo and describes a person whose brain is dead but looks functionally healthy, hypnotically controlled by somebody. Romero was the one who made it into a living corpse. Vampires are traditionally based off the Vampire bat native to Eurasia. Some regions describe them as cursed humans who drink blood and eat flesh of healthier humans to keep themselves young and healthy (this goes back to the jewish blood libel myth), other regions describe them as wretched undead who cannot withstand the sun and subsist in the dark living off flesh, many such iterations. A lot of vampire tropes are a combination of all such iterations so you cant exactly say Eggers is sticking to the source material when in the modern canon of vampirism, the Dracula canon, hes supposed to be similar to Dorian Gray instead of Gollum. It may be accurate to one specific iteration of vampirism but it doesnt necessarily work here imo, especially given the film is about rape and seduction, not animalistic consumption.
Edit: In fact now that I think about it, Vampires are to women what Sirens are to men, theyre meant to be beautiful and seductive but ultimately predatory. If youre making a movie which involves seduction on some level, it only logically makes sense to make the characters attractive. Orlok in the original film was not attractive but he at least looked like a human being and in that movie he hypnotizes miss hutter instead of some prophecy shit.