You're well aware that athleticism isn't the only trait needed to be successful in the NFL though.
Coaching: motivation, system, teaching, and utilization.
Knowledge: understanding system
Heart: dedication and focus
Athleticism: balance, coordination, control
Measurables: speed and strength
Teammates: a player compensating for shortcomings of teammate will be less effective.
Toughness: fearless and plays through pain
They are all important to success. I have them in order of importance, in my mind, although there are thresholds to each. That is, a WR who runs a 5.4 40 can only do so much even with greatest coach, heart, and football IQ. Likewise, if Jerry Rice was played as a NT he would have failed miserably. Exaggerating, of course, but Rice played in a West Coast Offense which perfectly matched his skills. If he played in a run and shoot, he probably would not have done as great.