I'm surprised you left out pull-ups. They are a great compliment to chin-ups, and build the back and chest more. You can use the same equipment and technique, just spread your hands a bit, and face your palms away. I have one of those Iron Gym doorway pull-up bars, and it also has a way for me to hold my hands sideways (90 angle to chin-up or pull-up). I feel these more in my forearms, which has to be good if you're practicing a grappling art.