The problem with Dark is that it lacks amazing Hime. Satan is the best one, at least once Awakened.
As mentioned Berith and Pluto are prooobably next up, and with SSR Amon rebalance happening this month hopefully I'd say she's also up there. Followed by Susanoo and Chernobog. I think that's it for Dark SSRs worth a Miracle Ticket...?