I think TOEFL 105+ will be enough. Problem is, you don't seem to have enough leader experience that would be competitive for an MBA. So top 15-25 would be a good choice for you, but don't expect too much.
What easyandme said is misleading. Leadership doesn't mean you have to be a manager. Instead, it means how you could influence and motivate people around you whether you are a financial analyst, engineer, consultant or something else. There must be countless moments you could tell to demonstrate your leadership over the past four years. Hope it helps.