Despite his impact at the likes of AC Milan, Paris Saint-Germain and Inter Milan, Ibrahimovic has never been among the final three contenders for the prestigious accolade.
While Raiola has praised Cristiano Ronaldo and Lionel Messi, the 'super agent' feels the Swedish striker is from another planet.
"I immediately say that between Cristiano Ronaldo, of whom I'm a big fan, and Messi, I'll always pick the Portuguese," Raiola told Tuttosport.
"Zlatan, on the other hand, is from another planet in his own right. He is the most complete player ever in the history of football.
"He has the talent of Messi and the willpower of CR7. If the Ballon d'Or had been voted for by the public, I know he would have won eight."
The 38-year-old has shown no signs of slowing down this campaign, after bagging 10 goals in six Serie A games for Milan.