I've worked at some startups that were _very_ successful, despite the founders only having a couple of these skills. Number (1) Grit seems to be mandatory, the rest can be made up for by having the right team. The thing you don't list that seems to be important is _charisma_ - successful founders can _convince people_. Sometimes that's in opposition to (4) Communication, and as an engineer that causes me pain, but it seems like convincing people to believe in something often takes the place of understanding other people's thoughts. And somehow they succeed anyway.