I cannot confirm whether it's the greatest or not (I haven't checked them all,) but Andy Raskin on the Pocket has an excellent post titled The Greatest Sales Deck I've Ever Seen. In it, he details 5 elements to sequence any pitch and gives solid examples of each: #1. Name a Big, Relevant Change in the World …
Tell Me a (Short) Story
Stories are the raw materials of development. They should stay in a raw form until needed. Or, as stated by the third “law of development physics”: The value of requirements increases as its production release becomes imminent. Or, you know what you need when you see it, until then, make up a good story.