ZMA, L-Dopa... great sleep stack.
Melatonin - It works, it's safe, but it's possible to become dependant and have trouble sleeping without it.
Valerians a good idea too. Benadryl will make you sleepy (it makes me speedy...), I wouldn't recommend Benadryl to take everynight for sleep.
Some of the gH sleep enhancers work well. our company's product is called Blue GrowtH, it contains things to increase gH and help sleep. It fixed my crazy sleep patterns and gave me some good gains. Powerfull has also been a very amazing help in the sleep/mood department. L-Dopa is a fantastic compound