Have you read anything by Sarah Waters and/or Emma Donoghue? Both are known for their excellent (lesbian) historical novels. Sarah Waters is better known of course, a couple of her novels have been turned into tv seris. I think Fingersmith is Sarah Waters best work to date, a Victorian crime novel that's very Dickensian, very tightly plotted with many surprises. My favorite book by Donoghue is Lifemask, about a female artists in late 18th century Britain who has to battle society's disapproval of her friendships and art.