When it comes to describing animals that primarily consume plants, the term "most herbivorous" is frequently used. However, there are numerous other expressions that could be used to describe these creatures. For instance, you could use terms like "vegetarian," "plant-eating," or "folivorous" if you're looking for a more specific definition. Alternatively, you could use "grazers" or "browsers" if you're talking about herbivorous animals that consume grass or leaves, respectively. Other terms like "primary producers" or "autotrophs" are used to describe plants that produce their own food through photosynthesis. Overall, there are many synonyms and related terms associated with "most herbivorous" that you can use to add variety to your writing.