Eikoku Koi Monogatari Emma: Molders-hen

These two series have quite the similar setting and atmosphere, however with Eikoku Koi Monogatari Emma: Molders-hen it is more focused around a love story compared to Dantalian no Shoka where it is more focused on action. 

Both have the same feel of atmosphere around them. Gosick works more on detective and the supernatural while with Emma, it's more focused around a love story. 

The atmosphere and setting are both the same although with Kuroshitsuji it's focused around a butler and the supernatural whereas in Emma, it's around a maid and is a love story. 

Romantic shows that start off with a heroine who works hard, being modest and very strong willed, not easily mislead by attractive bishounens (until the very end of course they cannot lie to themselves as they are madly in-love with them too, mutual feelings) which from the start the (typically rich and handsome) protagonist had his eye on the heroine and persistently chased after her until the end. Of course there being a few complications and romantic rivals which actually (as usual) persuaded the main characters to FINALLY be together and confess their love, Maid-sama is a little bit more immature in comparison but if you like romance you will like either, Emma being less popular but just as good.  read more 

Forbidden romances, similar characters (Romeo=William, Hermione=Eleanor, Lord Montague=Viscount Campbell, etc.), both inspired by English stuff (Shakespeare plays and maids, respectively) and both really good drama-romances!