Most maniac is a phrase that describes a person who is extremely obsessed or crazy about something. Some antonyms for this phrase could be calm, collected, rational, or level-headed. These words describe someone who is not prone to emotional outbursts or impulsive behavior. Some other antonyms for most maniac could include measured, reasonable, sane, or logical as these words imply a sense of balance, temperance, and a responsible mindset. While being intensely passionate about something may have its benefits, it's important to keep calm and logical in order to make the best decisions for ourselves and those around us in the long term.