You listed some great houses, but I think what puts AWiL over them is the fact that it connected with fans of the film. And it just so happens that people who love quirky movies like AWiL love HHN. If I hadn't seen the movie and it wasn't one of my favorite movies ever, then I wouldn't regard it so highly. But there's something about walking through an exact replica of one of your favorite films that's really cool.
Yet unlike other movie-house adaptations, AWiL followed the movie extremely closely, with impeccable attention to detail, while still managing to feature some innovative scares. Furthermore, no house in HHN's history (movie-based or original) has featured anything comparable to those wolf puppets--those are some of the most amazing things I've ever seen in a theme park attraction.
While you listed some very intense houses, AWiL wasn't really going for intensity I don't think (the fact that it features some good scares is an added bonus IMO). It wins in being a fantastic translation of a cult movie, and being innovative in a lot of its design.
American Werewolf in London, the film, is one of my favorites, to clarify, it's a fantastic horror comedy. I think peoples' love for the film is clouding their opinion of the house, however - it's definitely a (mostly) great recreation of the film. That doesn't mean it's the scariest house ever made, or even the best. With a few exceptions, AWIL isn't very scary. You could argue that's true to the film, but I'm judging AWIL as a haunted house, not a set recreation.
Disagreed on the puppets. The THING puppets in 2007 appeared to be pretty spectacular before they were systematically destroyed over the weeks of the event. These guys are amazing, don't get me wrong, they're horrifyingly impressive... but they are an evolution of a concept that IMO hasn't been utilized enough. Happy to see them here. I don't think it makes this the best house ever.
Definitely some great houses. Only ones I'd add off the top of my head are the Hallow, and Psychoscareapy: Home for the Holidays.
The Hallow is definitely a great choice, loved the hall of masks, the headless horseman and Lord Samhain. I was only counting houses I've actually experienced (08 on), so if we go back further, based on fan agreement we'd need to include Screamhouse (1 and Resurrection), Body Collectors '05, Demon Cantina, RUN, Psychoscareapy (all but Echoes), Dreamwalkers, Dead Silence, The THING (2007), Texas Chainsaw Massacre, Ghost Town, Castle Vampyr, Hellgate...