Has any major commentator ever attempted to rank the 613 commandments by order of importance? There are hints in the Sources about relative importance: The Ten Commandments, the Noahide Laws, the Big Three of pikuach nefesh, Hillel's Golden Rule, the chukkim, tzedakah [Bava Batra 9a, Ketubot 68a], and many others.
Yet the Mishna tells us not to do it: Be as scrupulous in observing a minor commandment as a major commandment, because you do not know the value of each commandment. [Avot 2:1]
Nevertheless, has anybody attempted a ranking?