Oh there are tons! I’m not sure if you mean released as in dolls or just in general so I’ll just include lists of both. 

Trademarked characters who have been mentioned in webisodes/written material that don’t have a doll yet (I bolded the ones we have yet to seen in webisodes yet)

• Cedar Wood
• Daring Charming
• Dexter Charming
• Duchess Swan
• Sparrow Hood
• Kitty Cheshire
• Lizzie Hearts
• Hopper Croakington II
• Darling Charming
• Gus Crumb
• Hilda Crumb
• Holly O’Hair
• Poppy O’Hair
• Melody Piper

Characters that have trademarked but have yet to be officially introduced

• Alistair Wonderland
• Bunny Lapin
• Cerise Wolf (Its believed that this is just Cerise but with her fathers last name)
• Faybelle Thorn
• Glida Goldstag
• Isabella Beauty
• Nina Bella

The wiki has a list of all the EAH trademarks here (x)
Also everafterhighconfessions made a great list of all the characters in the Land of Ever After here (x)