Radagast in The Hobbit Film (SPOILERS)

[cellurdur]

Originally Posted by Morthoron

Radagast's mission wasn't to commune with the birds and bees, it was, with the other Istari, to unite the foes of the One Enemy; therefore, like Saruman and the Blue Wizards, he failed completely. His failure may be seen as benign when compared to the malignant intent of Saruman, but he strayed from the objective. He went native, I guess.

I would not be so quick to call the Blue Wizards failures. I think given the evidence it is more likely that they succeeded. Tolkien indicates there is a chance they managed to lead successful rebellions in the East. Considering Sauron had most of the world at his command, this does seem more likely. Whether they fail into evil afterwards or their followers did is a possibility.