#6 Sam Angus, for repping startup founders at Fenwick & West

Sam Angus is partner in the Venture Capital and Corporate Group at Fenwick & West LLP. His practice concentrates on advising start-up/venture-backed companies, seed, venture capital and debt financings, mergers and acquisitions, intellectual property licensing, joint ventures and general corporate matters.

The contemporary proverb “behind every good entrepreneur, there's a great lawyer,” holds perfect in this case. When GitHub raised a staggering $100 million in its first round of funding, Angus was on the case. And he has represented Airbnb's founders since its earliest days—when their online-lodging powerhouse actually brokered inflatable-mattress space.

#5 Brent Tworetzky, for speeding textbooks into students' hands at Chegg

Brent Tworetzky is Business Leader, Textbooks & eTextbooks at Chegg Inc. He’s playing a pivotal role in filling the gap between digital textbooks and hardcopy books. The company that was famous for textbook rentals has come up with software that it says will aid in the transition by offering digital textbooks that act an awful lot like physical textbooks.

Chegg rolled out a new eTextbook Reader which is written in HTML5, so students can access their digital books on any platform, Windows, iOS, Android and others.

Also read: 13 Best Tech Companies To Work For In 2013