So this is pretty much like the pizza one, but because there are way many more sandwich combos than pizza combos, I'm not going to list every single combo. Like, Steak+Cheese+Onion+Peppers is still classified as a Philly Cheese. I'm only starting with a few, I'll add more as I go.
S-Tier:
Philly Cheese
BBQ Pulled Pork/Brisket
Cheeseburger
High Tier:
Meatball Parm
Gyro
Cuban
Bacon Egg Cheese
BLT
Mid Tier:
Chicken Cutlet
Lobster Roll
Reuben
Thanksgiving Sandwich
Sausage & Peppers
Chicken Parm
Sloppy Joe
Grilled Cheese
Roast Beef
Low Tier:
PB&J
Ham & Cheese
Tuna Fish
Turkey
S-Tier:
Philly Cheese
BBQ Pulled Pork/Brisket
Cheeseburger
High Tier:
Meatball Parm
Gyro
Cuban
Bacon Egg Cheese
BLT
Mid Tier:
Chicken Cutlet
Lobster Roll
Reuben
Thanksgiving Sandwich
Sausage & Peppers
Chicken Parm
Sloppy Joe
Grilled Cheese
Roast Beef
Low Tier:
PB&J
Ham & Cheese
Tuna Fish
Turkey