The original Fright Night was one of the cinematic pioneers of the sexy vampire (along with Vamp, Frank Langella's Dracula, Interview with the Vampire and Lost Boys.) That well's been drained dry.
None of those films even comes close to pioneering the "sexy vampire" in cinema. Modernising it maybe, to a certain extent, but definitely not pioneers.
The real pioneer work was done in the 60's and 70's by European directors, who were making highly stylised films which often featured full frontal nudity and sex scenes. Even Hammer here in the UK sexualised their gothic vampire films as much as the censors would allow them to for the late 50's and 60's, even if they did go a bit camp and ridiculous with some of it in the later years.
Didn't they start the sexy vampire trend in the 1931 Dracula (and the Broadway show that preceded it), where Bela Lugosi played him as a suave, charming Eastern European aristocrat?