Bard: College of Resonance - Bloodborne inspired. Using reverberations to create rifts between planes to summon eldritch beings, debuffs, and madness with the sound of a bell. Thunder and psychic damage spells.
Paladin: Oath of Dragon - A paladin with draconic abilities that serves a dragon. The oath is sworn to that dragon. I've been working on a channel divinity that will have options like different types of breath weapons, dragon eyes (blindsight), wings, and such.
Ranger: The Feral Stalker - A ranger that has chosen to exile themselves in the wilds as a result of contracting lycanthropy. A more feral ranger with some barbarian like abilities, natural weapons, howl buffs and debuffs and maneuvers.
Sorcerer: The Poltergeist - A sorcerer that can find and talk to spirits and ghosts. It'll be the sorcerer version of the phantom rogue. Subclass abilities will allow you to posses creatures, travel into the into the ethereal plane, and even become a ghost. I have an ability in mind that will allow the sorcerer's soul to leave his body, travel in the ethereal plane to scout ahead.