One who has a propensity for being displeased with anything that is not perfect or does not meet extremely high standards.(noun)
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Use "perfectionist" in a sentence
"My surgeon had a national reputation and was known as a perfectionist."
"Which, judging by the copious accounts of her doings, she was, but Gladys was also a vain perfectionist, obsessed with the “kink” in her nose that kept her from possessing a perfect Grecian profile – an obsession that led to the ruination of her beauty before she was yet forty."
"During the Boston performance, Europe, who was known as a perfectionist and a demanding leader, had told one of his drummers to “put more pep in the sticks.”"