Actually, Sundar Pichai was considered the top CEO until this past year. Pope Francis was considered top gun last year if we can consider the Catholic Church a business.
In 2019, Jeff Bezos is likely to win the prize for 2019.
However, Tim Cook has consistently created growth and wealth of the company since 2009, 10 years running even though he has not rewarded himself the pay as others have in their respective companies. As far as stock holders, employees, and customers are concerned Tim Cook is the best CEO, period. Before retiring, I would have said it was Bill Gates back in his day, but he disappointed everyone by leaving Microsoft in the hands of that bozo the clown Steve Ballmer.
While Tim Cook was not CEO until 2011 he had significant influence in the operation of the company as Steve Jobs' health declined. Here is a pull from Investopedia:
"Cook joined Apple in 1995 and became the chief operating officer (COO) in 2007, where he remained until his promotion to CEO in 2011.
At the beginning of Cook's tenure at the company, Apple was struggling to keep up with other computer giants, such as Microsoft and Dell. However, soon after he arrived things began to look up. Apple began to expand its influence abroad and reach further into international markets. The company was also preparing to release a new line of products that the world had yet to be exposed to in the late 1990s. The iPod and iMac were about to be released, followed by a series of computers, phones, tablets and endless accessories that made Apple the international technology powerhouse it is today. Cook's contribution to this expansion and growth came in his role as the head of Apple's Macintosh division and as a reseller and supplier strategist."
In a measure of how the company grew under one man's leadership, not how much money he made for himself or how many companies he owns, Tim seems to have risen to the top as has Apple.