If they are BOLDED
then they are taken!
Canons from DA: O-A, and DAII:
Loghain Mac Tir - PM Romana if interested!
This is very much a non-complete list, so if there is anyone in the DA world you'd like to play but isn't shown here, feel free to ask for them!
And keep in mind, this is an alternate Dragon Age universe, so certain characters, i.e. Bethany/Carver Hawke, don't necessarily need to die. But for established DA: Origins characters, i.e. Leliana, Oghren, they should follow most of their canon history to a certain point.