I’d like to mention the “W” word just for the complimentary shot. 
As far as completed CoG, HG AND HC:
• I’m a fan of the RO’s in A Pirate’s Pleasure (like all of them. Though I’m slightly more partial to Lord Eden)
• Belle-de-Nuit also tickled my fancy
I kinda like CoG ROs a little more because the story itself isn’t focused purely on romance and a lot of the times it gives the reader a more fleshed out relatable characters.
• Qui from VTM: Parliament of Knives,
• Crème de la Crème ( I can’t count how many playthroughs I’ve went through with this game just because of all the different ROs!
• The Warewolves series. I love the ROs in these ones as well my only complaint is that the ROs share a lot of similar dialogue but the actual romance scenes are unique to each of the ROs.
• If your a fan of angst there is a certain knight from the the Champion of the Gods series that always breaks my heart.
Now as far as current WIP’s, there are so many to choose from! I would be editing this for days trying to remember them all! But a few that stands out for me are:
• A Mage Reborn
• Defiled Hearts
• Arcadie: Second Born
• Stars Arisen
• Myrk Mire
• The Passanger
• Sword of Rhivenia