Varric/Hawke, set during the doomed year in the In Hushed Whispers quest. Whether Varric was with the Inquisitor (and thus injected with red lyrium in the prisons) or wasn't (and so is free to be at Hawke's side) is up to you.

(I strongly prefer f!Hawke, and that's what I'd most like to see in this, but I'm certainly not going to stop anyone from writing a m!Hawke if that's their preference.)