Maybe five stars is too many for this but it's probably my favorite of Eden's Gothics. For whatever reason, this one gave me the desired feeling of dread and impending doom that a lot of Gothics don't manage to supply.
Everyone except the heroine Fanny (orphaned young and raised by her aunt and uncle at Darkwater) seems appropriately suspicious. There's superficially genial Uncle Edgar, whose rather unpleasant personality is too close to the surface not to show itself frequently when he's crossed. His too ambitious wife, Aunt Louisa, who wants only the best for herself and her daughter Amelia. Amelia, spoiled and jealous of Fanny's beauty and wanting to be the girl everyone notices and admires. Lady Arabella, Louisa's mother, who loves to tell children scary stories and wants only the best for grandson George (Amelia's brother). George, a veteran of the Crimean War, who comes back broken emotionally, fixated on Fanny and with a very short fuse.
We also have two young orphans, recently integrated into the household after the death of their father (brother to Uncle Edgar) and mother in China. And then there's Adam Marsh, man of mystery, who meets Fanny when she goes to pick up the orphans in London upon their arrival from China, and then, unexpectedly, moves to an estate near Darkwater on the moors. Will he be the love interest for Fanny? Or is he not to be trusted either? And why is he paying so much attention to Amelia?
There's the death of one character, the disappearance of another, the escape of a convict, lots of questionable behavior by several of the characters, the mystery of the "white bird" enhanced to a scary level by Lady Arabella in her retelling of the tale to the new orphans, intrigue about jewels, money and inheritances. And some low-key romance. What more could a Gothic romance have?
This is relatively old, having been written in 1963, so you'll have to put up with some outdated prejudices and ideas, but it's a Victorian Gothic and all that fits the times of the setting.