Isn’t “best plebe” a bit of an oxymoron?
Focus on being the best YOU can be, without comparing yourself to other people. Everyone is going to have their strengths and weaknesses. Some of your classmates will struggle with running, others with pushups, rates, drill, bearing, teamwork, or staying calm when getting berated. Some will struggle with all of the above. Nobody will be perfect. Be collaborative, be selfless. You are not competing against these people.
That said it’s certainly fine to want to be a top performer. Part of that is being in top shape, learning your rates, moving quickly, and following orders to a tee. But also instead of comparing yourself to your fellow plebes, try to help them as much as possible. If people see genuine selfless effort from you, then you will be a valued plebe!