The antonyms for the phrase "most bad-looking" can vary depending on the context of its use. In terms of appearance, antonyms could be "beautiful," "handsome," "attractive," "good-looking," or "pretty." If used in a judgmental or critical sense, antonyms might include "acceptable," "decent," "adequate," or "presentable." In a more formal setting, antonyms could be "refined," "sophisticated," "elegant," or "polished." Ultimately, the antonym of "most bad-looking" hinges on the situation and tone of the conversation. Whatever the antonym, it is generally safe to say that it would carry a more positive connotation than the original phrase.