Call of the Wild mod which adds a bunch of classes from the tabletop has Antipaladin with the Blighted Myrmidon archetype, which is an absolutely perfect fit for an Evil playthrough. Instead of smiting good (worthless) you smite animals and fae regardless of alignment (perfect thematic and gameplay fit) and drain health from them with your aura. It also works really well with the stuff you get from the Ravenous Queen questline, which seems to be tailor made for an antipaladin despite that not being a class option in vanilla. Would recommend.