Sibling in the US won't be relevant at all.
You're overestimating your candidacy a little bit. There's a lot of incredibly qualified people out there from around the world applying to these schools - and even they will have a tough time. I can understand why you may feel your candidacy is stronger than it really is -- your GMAT -- but keep in mind that the GMAT is rarely if ever an asset, and can only be a liability (a high score won't help your chances, but a low score can keep you out). So beyond a certain threshold (700-720), it comes down to everything else. You may have a pretty solid start to your career thus far, but again you're up against people who will have stronger resumes than you (more experience, experience outside of India, etc.).
Stretch: choose 1-2 from Kellogg, Booth, Columbia, Tuck, Sloan, Haas
Sweet spot: choose 3-4 from Ross, Duke, Darden, NYU, UCLA, Cornell, Yale
Safety: choose 1-2 from any school outside the top 16 (Georgetown, Tepper, Texas, UNC, USC, Emory, Maryland, Purdue, Indiana)
As you can see, it's not a huge adjustment from your original list, but a slight shift. Just keep in mind that none of the top 16 schools are safety schools for just about any candidate.
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