I'm realizing as I read through this thread that I really haven't watched many vampire movies or vampire related movies as I thought I had. But one of my favorite movies of all time is, allegedly, about vampires. As someone who can't get enough of the campiest, most crazy interpretations of urban myths and legends, take these with a grain of salt -- the movies I enjoy the most are usually the worst or most absurd because I admire movies sometimes for what they try to do rather than what they accomplish.
Ones I've seen personally and would recommend:
Moon Child - If you are a fan of visual kei, this is a mandatory watch. Stars Gackt and Hyde as the two leads. I don't have a single coherent phrase that could describe the experience of watching this movie. My only relayable experience is that there was a moment (you'll likely Know when you see it) that just required the most insane suspension of disbelief I've ever had to do in a movie setting. My best friend and I thought it was so funny that we spent like 10 minutes playing variations of the same clip sped up and slowed down. And then went back to do it again after the credits.
Vampire Hunter D: Bloodlust - some of the most gorgeous animated art. It's just such a visually pleasing movie and the story and worldbuilding was enrapturing.
Underworld - If you enjoy the liberal interpretations of "vampire" surrounding the twilight craze of the early 2000s, this one's for you. this movie struck a chord -- to the point where I put it on while making dinner and then had to pause it until I was done because I was so fascinated by every choice it made. It is objectively not a good vampire movie but has a special place in my heart.
Ones that my close friends keep bugging me to watch:
Sinners - I've not heard a single negative thing about this movie since it came out, which is rare because my friends tend to play the critic.
A Girl Walks Home Alone at Night - this one's been on my watch list for over 2 years and i still haven't gotten to it somehow, but my best friend loves it.