The phrase "most under the table" implies something hidden or secretive. Antonyms for this phrase could include "above board," "transparent," or "openly." Alternatively, "most under the table" could also suggest a lack of efficiency or effectiveness, in which case antonyms might include "efficient," "effective," or "productive." Additionally, the phrase could also have negative connotations of corruption or dishonesty, so antonyms such as "honest," "upright," or "law-abiding" could also be appropriate. Ultimately, the choice of antonym will depend on the specific context and intended meaning of the phrase "most under the table.