The term "most high-and-mighty" suggests arrogance, haughtiness, and superiority. Antonyms for this phrase include humble, modest, unassuming, down-to-earth, approachable, and egalitarian. Someone who is humble recognizes their imperfections and limitations, while someone who is modest is moderate in their behavior and does not exaggerate their importance. An unassuming person is not pretentious and doesn't put on airs. Being approachable means that one is easy to talk to and doesn't intimidate others. Finally, an egalitarian person recognizes the equality of all people and does not place themselves above others. These antonyms provide a positive contrast to the negative connotation of "most high-and-mighty.