Hiten Shah is the Co-Founder of CrazyEgg, KISSMetrics, and Quick Sprout. He’s one of the most helpful people on the internet, puts out incredible content via Product Habits, and tweets often about actionable management and product tips.
Stewart Butterfield is the CEO of Slack, wrote maybe the best post ever on Medium, and engages in fascinating discussions on twitter about culture, society, and cool stuff being built by the Slack team.