Also in the spirit of this question, Gustave Flaubert (Mme Bovary) obsessed not only about the perfect sentence but the perfect word, hence the term le mot juste.
“Flaubert scrupulously avoided the inexact, the abstract, the vaguely inapt expression which is the bane of ordinary methods of composition; he never allowed a cliché to pass him. In a letter to George Sand he said that he spends his time “trying to write harmonious sentences, avoiding assonances.”
Flaubert believed in, and pursued, the principle of finding “le mot juste” (“the right word”), which he considered as the key mean to achieve quality in literary art He worked in sullen solitude — sometimes occupying a week in the completion of one page — never satisfied with what he had composed…” Source