These are the first few images I've done so far.
(Accidentally inked over her top teeth . . . and on an off-white paper I can't use white-out.)
I'm also trying to figure out how to describe faces with as few lines as possible and have the drawing not only portray the same expression but be recognizable as that person. I was having trouble inking this guy's face and having it match the amount of detail and ink that I put in his coat. Unfortunately, like most of these photos, the lighting is very soft and universal so there are very few deep shadows in the reference.
I'm not happy with any of those solutions, so right now I think I need to add either more detail to the coat or a stronger directional light to the whole image so that the top left version would fit.