#27: I'd recommend Catherine Gaskin's "A Falcon For a Queen". Although some may see it as an historical romance, there were definite Gothic elements in this.

Thank you guys for your contributions!  I'm behind on updating this list, but at some point I will revise my first post and add your contributions up-to-date.

Doddric, you're right, I didn't specify that the novels included here had to be specifically Gothic romances.  It all gets so murky anyway when you try and define a subgenre too specifically.   Most quality Gothic romances can usually be categorized in other areas as well (literary novel, suspense, mystery, etc.).  Part of the appeal of a "good" Gothic is usually because it in some way strays or bends the "formula," which oftentimes means it also qualifies it for other genres.

#26: "The Reflection of Evil" (Originally "Death of a Fox") by Jan Roffman. I don't know if she wrote many books, but I ran across this one and found it to be a page-turner. Couldn't put it down.

I think "Mistress of Mellyn" was very reminiscent of "Jane Eyre" but I also enjoyed "Kirkland Revels" by Victoria Holt.

#27: I took someone's suggestion and read "The Legend of the Green Man" by Sara Hely - great!

Someone else suggested "Sea Jade" by Phyllis Whitney (#4). It was well-written although somewhat predictable.

#28:  Although Josephine Tey is traditionally a mystery writer, I would classify "Brat Farrar" as a Gothic suspense story.  An excellent read.

#29: "The Hangman's Tree" by Dorothy Cameron Disney.

This list is really great. I'm going to try to read all of the books on it that I haven't already read. Thanks everyone!

#30: How about something from Stephen King? I've not read any of his books, but I've seen "The Shining" and "Carrie" and I'm sure they would fit into the Gothic category.

#31: "Mill Reef Hall" by Ariadne Pritchett. I just finished this book and thought it was wonderful. I had never heard of this author before now.

#32.  "Show Of Evil" and  "Reign in Hell" by William Diehl
#33.   "The Shawshank Redemption"  by Stephen King
# 34.  "Lost Souls" by Poppy Z. Brite
# 35. "I Am Legend"  by Richard Matheson

Two classics

33. Jane Eyre by Charlotte Bronte

34. Phantom of the Opera by Gaston Leroux

I agree these are two classics that are unforgettable, but I know "Jane Eyre" is 19th century and I believe "Phantom" is, too. Perhaps we can start a new list under Classic Gothics for this.