The poll was a tie, so I went with the option that most of the Discord also seemed to be interested in, the Raven Queen Warlock.
Originally introduced in a 2017 Unearthed Arcana, this subclass had some conveyance issues and was ultimately abandoned before the release of Xanathar's Guide to Everything. It's a subclass that seems to have been the Pact of the Chain mirror to Hexblade and Pact of the Blade, creating an interesting Scout Dynamic in a Warlock.
My version leans heavily on adapting mechanics for Raven Queen subclasses from previous editions, and taking some of the new design philosophies we saw in Tasha's (companion stat blocks, prof use scaling, etc.). I put my design notes in the document, and I'd love to hear your opinions!