The foreign Krustys there can only be 1 or 2. Frank Grimes is good. Springfield gorge and Airport are good. Itchy and scratchy what would be there tasks yet good. Would LOVE Isabelle as I am exactly like her except I know how to ride a bike and Eduardo.
Burlesque House ("Maison Derriere"), with Belle! That's one of the best episodes by far, and it could launch such an obvious and amazing questchain implicating basically everyone in Springfield. (Plus the gargoyle could be a decoration.)