Mac & Cheese - no thank you
Pot pie - awesome, just leave out the peas and carrots
Tuna Noodle - nasty
Bacon cheeseburger tater tot - I'd try it, but I don't know...
Shepherd's Pie - if done right, they can escape being awful
Cottage Pie - never heard of it
Chicken Tettrazini - that sounds like a chicken pasta, which doesn't sound very appealing.
Nastiness, or at least blandness, seems to be an essential ingredient of the casserole. Therefore, strata and pot pie are obviously not casseroles.
Here's a longer list of alleged casseroles, but I don't recognize very many of the dishes.
https://en.wikipedia.org/wiki/List_of_casserole_dishes