workmanlike
Done carefully and skillfully, but not fancy or showy.
Workmanlike describes something done competently and efficiently, without being flashy or spectacular. When a basketball team wins with workmanlike play, they execute the fundamentals well: they make their passes, play solid defense, and score steadily. They might not make highlight-reel dunks, but they get the job done.
The word suggests skill combined with a focus on the task at hand. A workmanlike essay answers all the questions clearly and correctly, even if it doesn't dazzle with creative flair. A workmanlike performance in a school play means delivering your lines clearly, hitting your marks, and supporting the other actors. It's professional and reliable.
There's something admirable about workmanlike effort. It means you know what you're doing and you do it well, even when no one's cheering. A carpenter who builds a sturdy bookshelf with clean joints and level shelves has done workmanlike work. The bookshelf might not win design awards, but it will hold books for decades.