When you die, you don't lose the basic structure of your personality, so colorless and bland isn't a likely destiny. Instead, they'll become arrogant, ambitious jerks in a situation where that sort of attitude will get the holy bejesus beaten out of them. Humility and empathy are normally learned through the experiences of failure and pain, and there are plenty of those ready for use in the arsenal of karma...

(Since most of the CEO types these days were born into wealthy families and got their status because of advantages they did nothing to earn, I suspect a lot of them will be reborn at the bottom end of the working class, so they can find out in person just how far they can get without Mommy and Daddy helping out at every turn.)