Work for a few more years.
Also, your college activities are good and solid, but not really out of this world compared to other applicants applying to these top b-schools. Remember that you're not competing against average folks at places like Wharton, Stanford, HBS, Columbia, MIT, etc. but you're up against some of the most ambitious and driven young working professionals IN THE WORLD. They also have had some strong college extracurriculars, and have solid and blue chip work experience.
For now, don't focus on schools. Focus on work - one step at a time. If you're so preoccupied with b-school, you'll be too distracted with what's in front of you, which is building up solid working experience. It seems to be a common refrain from recent college grads like yourself who are barely out of school and are already thinking about grad school years from now - and then taking for granted the more important thing, which is making the most of your current working experience.
Be the most accomplished person you can be (in whatever way you feel you want - no one should have to tell you how to be accomplished, or what to accomplish; that is something you need to figure out on your own). And then when the time comes to apply in a few years, you can then decide whether to go to b-school or not, and which schools may or may not be a fit for you. However, at this point it's really not much of a useful discussion.
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