My top 5 not necessarily in order except #1.
1. Pastrami and Corned Beef at the Carnegie Deli NYC
2. Kolbassi and Cheese at Primanti Bros Pittsburgh PA
3. Cheese Steak at Rex Style Pizza Philadelphia PA
4. Italian Beef with Giardinara at Mr Beef Chicago
5. Clam Roll at Iggy’s Doughboys Warwick RI