Ottens is not naturally talented IMO.
One that many cat supporters are leaving out is J. Selwood. He has serious natural ability. I also agree with the above top 3.
Ottens has plenty of talent. At his best, he is a great mark, can kick 55 plus with a excellent accurate textbook action, one of the best tap ruckman in the league, can kick goals and one of the few players that can genuinely play two positions (Ruck and Forward). Its ashame because injuries have really held him back.