Historical romance is such a huge umbrella, but for those dominating the bestseller lists, you really can't look past Julia Quinn and her Bridgerton series. The Netflix show obviously blew up, but the books have been consistent top sellers for years—they have that perfect blend of witty dialogue, family dynamics, and just enough historical texture to feel immersive without getting bogged down. Lisa Kleypas is another powerhouse; her Wallflowers series and the Ravenels are practically genre staples. Her heroes are often deeply flawed but redeemable, and she builds a great sense of community across her books.
Sarah MacLean is a more contemporary voice in the genre but absolutely dominates the charts with every new release. Her Hell's Belles series is a fun, feminist take with lots of action. Then there's Tessa Dare, whose books are known for being hilarious and heartwarming, often focusing on lesser-titled characters. For a grittier, more intensely researched feel, Beverly Jenkins is essential reading—she writes phenomenal African-American historicals that are both romantic and educational. Her work is foundational.
If we're talking sheer volume and commercial staying power, though, you have to include the classic titans like Johanna Lindsey (especially her Mallory family books) and the late, great Mary Balogh, whose Bedwyn saga is a masterclass in slow-burn emotional depth. Their backlists sell like crazy.