The BBC Jordan version is the closest to the novel, but note that I said closest. I don't think there has every been a cinematic version that has been 100% adapted from Stoker's novel. For example, Dracula's appearance. When Harker meets him, he has long, grey hair and a huge grey moustache. Coppola's version did show him as an old man, but not soup-strainer (he did have one when he appeared younger, according to Stoker's description). It's like how in the three version's of Stephen King's Carrie, none of the actresses (Spacek/Bettis/Moretz) looked like King's description. She was overweight (bully nicknamed in the novel "puddin") and unattractive. And there has yet to be a cinematic version of Dracula to show how he was dispatched in the novel.
Gerard