Linda Hilton has pointed out, and I agree, that the crowdsourced list is light on romance. I am prevailing on our romance readers - Linda, Whiskey & OB - to give us a few more romances for the list.
Off the top of my own head, I would definitely suggest:
Lord of Scoundrels by Loretta Chase
Outlander by Diana Gabaldon
Pride of Lions by Marsha Canham
Can you guys help us out? Maybe another 20?