If it comes from the factory with such pronounced corners, chances are its a Phillips/Square drive combo. In which case you can use a square drive bit which will drive it without slipping (IIRC square drive has similarly high torque before cam-out as torx). There are a ton of different kinds of screw drives though, the phillips-adjacent ones are under cruciform here: https://en.wikipedia.org/wiki/List_of_screw_drives