The phrase "most classed" means that something is considered to be of the highest quality or rank. There are several synonyms for this phrase that can be used interchangeably. One such synonym is "top-notch," which implies that something is of the highest quality and is among the best in its class. Another synonym is "preeminent," which means that something is superior or surpasses others in its class. "Superlative" is another synonym that denotes excellence and being better than all others. "Exemplary" is also a good synonym and suggests that something is a shining example and a model to be emulated. Overall, these synonyms for "most classed" can be used to convey excellence, superiority, and quality.