Holy Grail Status: The Best Dry Shampoo I've Ever Used

My hair is pretty middle of the road: mostly straight, mostly healthy yet pretty greasy (the latter problem has led me to be a perpetual daily washer). My hair is so oil-prone that if I wash it in the morning, it's weighed down and slightly slick by the time my S.O. and I are trying to figure out dinner. I've tried a whole slew of shampoos, conditioners and treatments aimed at solving my greasy hair issues.