Well,there are quite a few more ,still not mentioned here.Concerning Dagon (2001), i liked its ending , while the rest of the movie,i can"t say it was breathtaking.There should be first of all,a very important distinction ,between movies ,that are Lovecraftian adaptations from his works,movies with lovecraftian influences,like "in the mouth of madness" and finally movies,with lovecraftian elements ,included in them like for examble "the evil dead",by Sam Raimi.
The most faithfull adaptation ,and probably the best movie of all,is one not mentioned here:"The Ressurected",by Dan 0'Bannon(1992),based firmly on the "Case of Charles Dexter Ward".It has an excellent acting performance by Chris Sarandon, and it is a must see...
Also ,based on the same story ,but with many ...Edgar alan Poe elements, is the "Haunted Palace", by Roger Corman(1963),whith Vincent Price at the leading role,and it is an interesting movie-unlike ,the other movie by Roger Corman in 1970,"the Dunwich horror"(pretty poor in my opinion).Also,the "Haunted Palace" is also recorded as the first ever movie ,dealing with a lovecraftian theme ,after Hpl"s death.
One of the best is also,the first Reanimator ,by Stuart Gordon,and capturing a great deal of the atmosphere.
Another movie ,probably the most recent one and worthy to watch is "Cthulhu" (2007),that borrows from "Shadow over Innsmouth",although the acting ,could be a lot more improved.Also, a necessary addition to the list is "Necronomicon" of 1993,that is comprised by 3 horror stories ,involving the book Necronomicon,and stars Jeffrey Combs as HPL himself(i expected more of that movie,to be sincere).
Also all of the "Evil dead" movies are based on the power of the book Necronomicon ,and they star Bruce Campbell....the last two are more into a sort of parody though-horror mixed with comedy elements.....Without the horror element ,you could pseudo-count Ghostbusters,but with a great deal of fantasy....