Hansbbans!!
Congrats on your choice - now you have the best part ahead of you,
I am glad there are no rankings for dental schools, which means I had to come up with my own ranking within the group of schools that I applied to.
If you have the possiblility, visit the dental schools in your area or if you visit in other states make time to take a look at schools wherever you are. Since you have some time, it does not hurt to see the schools yourself. Try to learn as much as you can about their program - classes/hours, teaching methodology, NBDE averages, clinical time and requirements. If you can, figure out what would work best for you - cost, location, if you want to specialize etc. As you see there are many many factors that play a role in ranking your own dental schools - that's why they are right, there is no way to rank them because what works for you will not work for me and vice versa. It is very important that you prioritize and aim to whatever is most important to you, but remember that dental school is a heavy load, so pick a place you would like to live in and would be positive about. You don't want to be miserable from the start - it does not help.
You will find various oppinions in this forum and it is a great resource indeed. However, don't base your decision on what others think or experience, you need to decide for yourself - you will see that there are extreme good/bad oppinions on the same school, it just depends on the person. The ivy league schools could work great for you or could not, again it depends solely on you and your expectations/priorities.
I don't know if this helps, but you can pm me if you have more questions.
Good Luck !!!