If Varric, Iron Bull and Ser Bara Blackwall are all unavailable, I'm not sure yet whether my initial dwarf Inquisitor will make the best of her options or stay single. We don't know enough about DHMG/Dorian and Solas for me to guess whether they'd be suitable matches for her, and if they're both LIs one of them is probably gay. And we don't know which of the ladies is available for hot girl-on-girl action.
The only ones I have definitely ruled out are the only two that have been officially announced so far. I look forward to romancing Cassandra and Cullen in some future play through, but neither of them seems like a good option for the first character I have in mind.