Would there be any advantage to adding more bees?
Do you have more than one hive? If so try this: Take a frame of brood from the other colony plus move any undrawn frames into the center of the problem colony. The undrawn frames will be drawn out as worker brood cells and the queen should be stimulated to lay with the insert of the brood frame. I've stimulated lots of queens to lay using that method. The last time was 2 weeks ago, I added a frame with 2 silver dollar (Eihsenhower) sized 50 cents pieces and the rest mostly open cells. The queen began laying in the remaining cells and then started on the adjacent frames as the comb was drawn. Saturday I saw both sides of a partially drawn frame mostly filled with eggs, the bees still needed to finish drawing the cells out to length. I went from a nectar bound hive to a productive hive that I'll be supering later this week.
Also, don't worry about the worker bees on the frame you take from the other hive...just make sure it doesn't have the queen so a frame from the side of the brood chamber works best. Bees on the frames inside the hive belong in the hive and they won't fight (Brother Adam has written about this but Some people miss understand what he meant).