Recommending some completed masterpiece manga

I've been looking for some completed manga series to binge-read lately, any recommendations?<br><br>My own recommendations:<br>1. <i>Fullmetal Alchemist</i> — Complete plot, perfect ending.<br>2. <i>Assassination Classroom</i> — Laughs mixed with tears, a moving ending.<br>3. <i>Haikyu!!</i> — One of the best sports manga.<br><br>What else would you all recommend? Preferably ones with endings that don't fall apart!