Leonardo DiCaprio, once again, missed out on an Oscar nomination. But that comes as no surprise. DiCaprio’s portrayal of easily-led naiveté and of greed blotting out love helps to set the tone of last year’s “Killers of the Flower Moon,” just as his vexed internal conflict drives “The Departed” forward and his headlong passion launched a million “Titanic” fans. It’s hard to feel bad for DiCaprio — who, first of all, is among the world’s most famous (and famously high-living) celebrities, and, what’s more, did indeed finally get his trophy. After an aggressive campaign that leaned hard on the notion...