Most whacko, meaning crazy or bizarre, has a number of antonyms that convey a different sentiment. Sensible, rational, and logical are some of the alternatives that can be used to describe a more grounded perspective. Other antonyms include conventional, normal, and mainstream, which may suggest a more conventional or accepted viewpoint. Additionally, words such as sane, stable, and balanced convey a sense of mental health and emotional regulation. Overall, the antonyms for most whacko offer a range of contrasting meanings, providing a spectrum of options for more precise and nuanced language.