What is the name of a quiet customer who finds conflict so distasteful that he will do anything to avoid it?

A quiet customer who finds conflict distasteful and goes to great lengths to avoid it could be described as a "conflict-averse individual" or a "peacekeeper." This type of person often prioritizes harmony over confrontation, leading them to withdraw from disagreements and seek compromise. They might be seen as accommodating and agreeable, often opting for silence or submission to maintain tranquility.