Your application package is strong to me. I believe that application essays can make the difference. MBA value is inflated by the number of educational programs out there. A MBA in top 20 rank is necessary in my opinion. Given that economy is weak globally and you are still young, I would recommend that you reapply next year. If so, I am glad that you did not apply too many top schools this year. You did not leave any bad impression.
Suggestions: 1, Ask for more responsibility in job and work that into your essay. 2, Retake your GMAT (if you want), make it 750 or more 3, Network and find strong people for recommendation 4, Work on your essays early and find a professional guide 5, Apply only top 15 schools, 10 of them, 5 in top 7 and 5 in top 15. 6, Be very very self-confident during essay writing and interviews.
To encourage you: I applied 8 schools are was rejected by 4. If I only apply 4, I might not get any offer.