Well, ok take my opinion with a grain of salt, as I am also an applicant so it's not like I am speaking from a ton of experience. I do, however, have a masters in economics from columbia university, so i've been through some of this grad school admissions mess.
I thought Alex from MBAApply gave some really poignant points in his article about what kinds of people get into Harvard, Stanford and Wharton (
https://www.mbaapply.com/advice2.htm#hsw). Basically, being male and finance mean you are from a traditional background (lots of other males who are also in finance will be in the same applicant category as you), so in my opinion, you'll need something else to distinguish you from the crowd, provided all else are equal. In order for "all else to be equal" as the applicants in same category (male, finance), you'll need a stellar gmat score with high GPA (or if not both, at least one of them has to be stellar) and with impressive work exp.
Not sure what you can do to give that extra X factor. You'll definitely need to beef up in the extracurricular, leadership or volunteer category in my opinion, as many of your competitors will absolutely be doing the same thing.