When hiring a new CEO it is important that they do not take a common board seat, as they might be aligned with VCs and they do not represent common stockholders. A new board seat should be created for a non-founder CEO.

BoD, investor control, founder-leaning board, new executives

Why is it important that CEOs don’t take a common seat on the BoD?

What are protective provisions? - http://www.startupcompanylawyer.com/2007/08/05/what-are-protective-provisions/

How to bring in a new CEO for your startup - https://hbr.org/2016/02/how-to-bring-in-a-new-ceo-for-your-startup