Good books don't always find publishers. I submit Courtney Milan as an example. She writes historical romances, excellent ones, well-edited and self-published. But her books frequently have middle-class (rather than nobility) heros and heroines, which most publishers don't like... gotta be nobility, and better yet if it's a duke. And she writes in the early Victorian era, when most publishers want Regency.
Now grant you, I'm as fond of a Regency-era duke as the next person, but I love, love, love Courtney Milan's work. Highly recommended.