Well, 'ol Jethro is my fave, but of the non-Presidents, I gotta go with Josh. Then, Toby, Leo, Sam, and Donna. Was disturbed that they turned Leo into a warmonger in season 5. Not exactly the same guy from "A Proportional Response". I get the Israeli defense minister's plane getting shot down in season 4 affected Leo, but gloriosky, people!
A special thumbs-up to Fitz, Ron Butterfield, Nancy McNally, Mrs. L, and Margaret! NOBODY had a better bench than TWW!