None of the schools on your list are financial safeties, therefore they are not safeties for you. As others have said, they will not guarantee to meet full need for all students, and are less likely to for OOS students.
You have a full tuition offer at UNC, which is a terrific school. It does not seem wise to risk that for a chance at Tufts and Colby when you would not have another backup option.
Getting waitlisted at Colby does not mean you’d necessarily get in ED. You don’t know how many people they waitlisted, but in recent years it’s been 600-700. Schools often say they could have filled another entire class with students they had to turn down or waitlist.