Not to be incisive, but I think startup founders are extremely poor role models. Of those I've met, most have been very narcissistic and self-serving (successful ones and failures alike). Plus, I'd wager that those who aspire to be 'startup founders' are putting the cart before the horse.

If black highly intelligent role models are who you're after - Neil Tyson exhibits all of qualities that a kid of any race/creed/religion should aspire to have.

source: I'm a jew and I love Neil.