Bigwig

Tom is a bigwig.

He's a bigwig.

He's some bigwig in the ministry.

The company bigwig is gathering his staff together for a meeting today.

[…] more innocently, and no doubt profitably, than if he had dined at a big-wig's board or bemused himself with smoke and beer among his brethren of the pen.

Before her hay-day, she attended many derbys under her dad's celebrity where she'd hobnob with the bigwigs in Millionaire's Row.