Rob, I'm right with you there. I saw the thread title and thought "The Persuaders - no-one's going to think of that" but, er...you did.
High Chaparral, The Big Country, those are also up there, and there was another (I think) John Barry theme for a series called The Baron? Has anyone mentioned Doctor Who? If not, why not?
The Lone Ranger doesn't count, it's classical music co-opted into TV fpr the boneheads who hadn't heard of Rossini or, for that matter, Beethoven.