Captain Jellico ( https://memory-alpha.fandom.com/wiki/Edward_Jellico#Captain_... ) provides a counterpoint to the "how Picard runs his ship" (which incidentally had Data installed as the XO over Riker).
He was also a prop device they used to make many changes they had wanted for a while Troy's outfit, the fish tank - Patrick Stewart believed that 24th-century humans—who had evolved past cruelty and the subjugation of life—would not keep a living creature in a glass tank for mere display.