The general consensus on Breath of the Wild so far is that it's at least a tier above that - the tier that defines a console generation. Games like Mario 64, Tony Hawk's Pro Skater, stuff like that. That's Tier II.
In Tier I are the games that are in consideration for the greatest games of all time: Ocarina of Time, Link to the Past, Final Fantasy VII, etc. Some people think it'll end up here, but we won't know that until we look back on it in a few years.