Charlotte Bronte’s Villette knocks everything else written by the Brontes into a cocked hat, for me. (Though have you read Jane Eyre and Shirley too?)
You’ve had some brilliant recommendations here, OP. I envy that you still have so many Hardy and Dickens novels yet to read (I’d start with The Woodlanders and Great Expectations respectively).
For Edith Wharton, start with The Age of Innocence, The Buccaneers (though the visible creak where Marion Mainwaring finished it is a problem) and the blackly hilarious The Custom of the Country — if you lean towards ‘cosy’ avoid Ethan Frome and The House of Mirth, both wonderful but grim.
MJ Farrell/Molly Keane (same person) is astonishing — socially-acute, brilliantly-written, often very funny stories set in Anglo-Irish Big Houses, mostly in the early 20thc, written out of her own experience. Austen-ish in their social attunement, Mitfordish in their humour and grotesque characters. Start with the very funny Good Behaviour, which should have got the Booker in 1981
I also recommend Persephone Books and finding old Virago classics in second hand shops — that was what led me to something I have seen recommended here yet, but which would suit you, and which is unspeakably brilliant, Rebecca West’s The Fountain Overflows and its sequels, This Real Night and Cousin Rosamund.
Everyone should read these novels — not only are they a brilliantly evocative portrait of Edwardian family life in south London, based on West’s own childhood (parties and Christmas rituals and clothes and food and odd bits of south London ) but they are also brilliantly characterised (a narrating child musical genius, an eccentric former concert pianist mother, a brilliant, unstable journalist father, a local murderess, a rich, lonely Jewish patron etc) and have moments of being almost magical realist because of the matter of fact way they present poltergeists, ghost horses, mind-reading.