The phrase "most standpatter" refers to someone who resists change and holds on firmly to traditional or conservative views. There are various synonyms that can be used to describe such a person, including "diehard," "traditionalist," "conservative," "reactionary," "stick-in-the-mud," and "unyielding." Other related terms might include "inflexible," "stubborn," "rigid," "uncompromising," and "unchanging." All of these words carry a certain connotation of resistance to new ideas or developments, suggesting an unwillingness to adapt to changing circumstances or accept different viewpoints. While these terms can be used to describe someone's political or ideological stance, they can also be used more broadly to describe their personality or temperament.