Am I cooking? Yes, spaghetti. No, Manicotti
Spaghetti has a thousand and one uses; ask any student who had to build a bridge out of it.
I hardly think lasagna and manicotti can be up there in the “staples” echelon of pasta. Good? Yes. Staples? No. Too much post-cooking effort involved with each. I would put fettuccine, macaroni, and penne on top of either when listing staples.