I usually tell people that put in damsels to do so at their own risk. The only one I would recomend would be the green chromis. Not as aggressive as most. I would only put one in in a tank your size. i have some yellow tail blue damsels that I have had in the tank since starting it up 5 yrs ago. They give me no problems, but they are small compared to the Tang and squirrel fish that I have.
Damsels try to dominate the tank, but I have heard good things about the green ones.