Wow, it just shows how much fans know about Al Jefferson. He is better than Amare, I think. The Gasol and Jefferson match-up is lopsided though. Gasol is getting old, but his passing skills and basketball iq will keep him above the rest. Al Jefferson is an absolute monster and don't forget it. I may be a t-wolves fan, but Jefferson is the real deal.
Rebounding - Al
Passing - Even
Scoring - Al
man/man D - Al
Zone D - Amare
Post - Al
Fast Break - Amare
Jumpers - Amare
Leadership/better teammate - Al
Least TO Prone - Amare (you be the judge)
Most likely to win a ring - Al?
Right now, Gasol is the best player of the three, no question.
However, in terms of potential, I'd like to say the following on the other two.
Amar'e - great athletic ability, an efficient scorer and one of the best finishers in the NBA, let down by the fact he's always been fed by Nash, and his limited defensive intensity. In my opinion, under the right coach and the right system, Amar'e could easily become the best of the three. He just needs some defensive coaching, to learn to apply himself defensively, and you could have one hell of a player. Also more luck with injuries would be beneficial.
Al Jefferson - let down by his team, which keeps his profile relatively low. He's a good rebounder, with a developed offensive game, and better defence right now than Amar'e. Like Amar'e, he has the natural ability to become a better and more effective player than Gasol, but needs to continue to improve his game each year. Probably the safest bet of the three, if you were looking to build a team for the future.