The only one I know of is Griffin McElroy, founding editor of Polygon. His mom died when he was young and his dad was a radio DJ, so he didn’t have family capital to build from. I don’t know if there are other co-founders and if they had family money or not.
A backwoods West Virginia radio host had 0 power over the success of his son’s video game magazine. I fail to see any nepotism here.