I like to use weighted dips with legs way out in front of the body. This hits my chest like no other exercise. my two second favorites are bottoms up incline bench on a low incline with a close grip pressing slightly up and back, a floor press performed guillotine press style and slight incline dip belt bench (performed like a regular DB bench but with a dip belt and weight, hands open) These exercises I feel hit the most of my chest fibers, better than anything else especially the dip belt press.