Spanish billionaire and founder of clothing and accessories retailer Zara, Amancio Ortegasurpassed Warren Buffet as the world's second richest man in 2015. His apparel empire, which has expanded over the decades to house approximately 6,500 shops in 88 countries, goes by the simple philosophy of aggressively advocating for the customer, limiting advertising, and giving them what they want as soon as possible. Although Ortega and Bill Gates routinely switch spots as the world's richest man, he still sits with his employees in the company cafeteria. He lives a humble life in La Coruna, Spain, visits the same coffee shop every day, and dresses in the same plain blue blazer and white shirt almost daily.

Tic Tacs, Nutella, and Kinder Eggs. She is perhaps the most honorable billionaire on this list, even though she didn't personally make the money herself. In 2011, Maria Fissolo became the widower of Italian entrepreneur and candy magnate Michele Ferrero, who founded Ferrero SpA, Europe's second largest confectionery company. The 98-year-old filthy rich Fissolo lives in Monte Carlo, Monaco.

German billionaire Karl Albrecht was the founder of supermarket chain Aldi, Europe's Walmart. When he died in 2014, he was the 21st richest person in the world. Like American billionaire Chuck Feeney, Albrecht lived a life of recluse, preferring to shun any accolades and transfer them to his employees. After he died, Aldi spokesman Sarah Twyman told Bloomberg, "He had a strong belief that everyone should be able to consume high-quality food and beverages at the lowest possible prices. He devoted his life to making his belief a reality." In 2014, there were more than 1,300 Aldi stores in the US and 3,500 in eight other countries.

Leonardo Del Vecchio likes to keep a low profile, perhaps because his company, Luxottica, price-fixes sunglasses and sells them at astronomical rates in proportion to what they cost to make them. More power to him. Luxottica owns (probably) every sunglasses chain store and brand you've ever heard of: Sunglass Hut, LensCrafters, Ray-Ban, Oakley, among others. Yep, they're all part of the same company. Del Vecchio is the richest man in Italy and the 37th richest man in the world. Though he only has a high school education, he was smart enough to know people will buy $200 Ray-Bans because most people with money (and people who don't have money) care about the status involved in a price tag. Especially if that price tag is hanging off a shiny new pair of Ray-Bans.

Abigail Johnson is the granddaughter of the founder of Fidelity Investments. In 2014, she became the president and CEO of the company. In 2016, Forbes ranked her as the 16th most powerful person in the world, probably because she oversees $2.1 trillion in worldwide investors' savings, pensions, and investments. However, Johnson isn't ostentatious—she's a grinder. One of her most important philosophies, which keeps her grounded, is to know that your job is never done. Her friends call her Abby and she dresses, as one publication put it, "soberly."

When he was a kid, he used to buy candy in bulk and sell it to other kids. This curiosity for money led Nigerian-born Aliko Dangote to become the richest man in Africa with a net worth of $12.9 billion as of June 2016. The Dangote Group is a world leader in cement production with other companies manufacturing salt, sugar and flour. As recently as September, Dangote invested more than $170 million in the production of rice and sugarcane in Nasarawa, Nigeria.

When he was 19 years old, Reinhold Wurthtook over his father's minuscule screw business and in 2013, they posted $13 billion in sales. He is at the helm of Adolf Weurth Group, perhaps the only multibillion-dollar company with the name Adolf in it. Known as the "Screw King," Wurth's company is a global supplier of assembly and fastening materials for construction, automotive and engineering trades. He owns a big fat $100 million yacht and 15,000 iconic works of art.

A man with a total of four sentences on his Wikipedia page, David Sun is the cofounder of Kingston Technology. In 1996, he sold the company, which specializes in computer memory products, to venture capital firm Softbank for $1.5 billion. Basically, every time you buy a phone, Sun pockets commission. He began in a garage with his associate, John Tu, and now he lives a humble, philanthropic life in Irvine, CA.

Corks, those tiny insignificant things that plug wine bottles... Americo Amorim is now worth almost $5 billion because of them. Like Reinhold Wurth, he took over his grandfather's small cork business and today the company, Corticeira Amorim, produces one quarter of the world's corks. Although little is publicly known about him, Amorim is the richest man in Portugal.

Until 2006, Aviv Nevo was "un-Googleable." He took personal care to keep his fortune private. The Israeli and American venture capitalist has substantial holdings in Time Warner, Goldman Sachs, eBay, Microsoft, Viacom, Goldman Sachs, Morgan Stanley, News Corp., JPMorgan Chase, and Twitter. If Nevo were to sell his shares in these companies and maybe put a few of his compounds which glitter the planet on sale, the $800 listed net worth would probably jump up a bit (or a lot). Nevo is perhaps one of the least-known yet most influential people in the world, with a seeing eye over Wall Street, Silicon Valley, and Hollywood. And the guy doesn't have one video on YouTube.