Gandalf the Grey, an Istari that cameout of Aman as well.  He defeated the Balrog of Moria at Zirik-zigal but fell also.  Due to the nature of his mission he was allowed to return to middle-earth and take over the order as Saurman at this time had become corrupted at Isengard. He would help the free-people stave off and defeat Sauron finally, thus allowing him to travel over the sea back to Aman.  Only one of the Istari not corrupted and accomplished his mission from which he never strayed…
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