A mainstay on just about every important board in town (McDonald’s, Lyric), this longtime chief was named by Barron’s one of the world’s 30 best CEOs yet again last year, up there with Warren Buffett and Jamie Dimon. (“His corporate engineering has helped investors realize great value,” the paper explained.) White’s next challenge: integrating the $5.8 billion purchase of Alere, a maker of medical tests, which he has said “will create the world’s premier point-of-care testing business.”