perfectionist
n.a person who believes that everything must be perfect. They often spend a lot of time trying to fix small mistakes.
n.a person who demands that everything be perfect or as close to perfect as possible. Often used to describe someone with an obsessive concern for detail and quality.
“He is a perfectionist and never leaves his desk until everything is perfect.”
“The project was delayed because the lead designer was a perfectionist who refused to approve the final layout until every color was exactly right.”
“While a perfectionist's attention to detail can lead to exceptional results, it often comes at the cost of efficiency, as they spend disproportionate amounts of time on minor aesthetic adjustments.”
“A true perfectionist – he wouldn’t present anything that wasn’t to his standard and it was an honour to witness.”
“She said: "It's actually perfectionists or those who go the extra mile who are more likely to experience this.”
From perfection + -ist.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.