The ones I mentioned are whats been recommended to me, but thats by powerlifters, so if you're interested in the cosmetic side then I dont honestly know. They would tell you to hit dips hard, probably, and rotate skullcrushers, tate press and board presses as your other bench assistance.

Another thing you can do that will help you increase your max bench is , after your last work set, drop the weight down to about 60% of your max, and do 3 sets of 8. Do them as fast as you can, with good form. This trains your body to the movement and technique of benching, its basically greasing the groove. Works on the same principle as WSB's DE days, training the CNS rather than the muscle.