I think KRAD's take on Jellico in his Captain's Log comic was closer to what how you saw the character than to Peter David's version.And his Jellico was way more one-note than the one onscreen. I got the sense from "Chain of Command" that Jellico would be a perfectly nice guy if you met him socially, but just wasn't the best choice to deal with a crisis situation like the one in the story. But NF's Jellico was basically your stock obstructionist authority figure constantly blowing his stack at the renegade cop who Doesn't Play By the Rules.