USA

Hi Rahul,
Considering that finance is not a problem, you can follow the following strategy. You can apply for 3 dream colleges, 4 reach colleges and 3 backup colleges. Considering the limited knowledge that I have about you, I'd suggest you go for the following: Dream:
Georgia Institute of Technology, University of California Los Angeles and University of Washington, Seattle.
Reach Colleges: University of Cincinnati, University of California Santa Cruz and Michigan State University.
BackUp colleges can be: Arizona State University, University of Utah Salt Lake and University of North Carolina.
Think of various other factors while finalizing the list as this may not reflect all the aspects and may also not be ideal for your profile. But it can act as a starting point to begin shortlisting your Universities list.

It depends on what you plan to study at college.
There is no single University which is best in all fields. Different Universities have their strengths and drawbacks. For instance, in research, Massachusetts Institute of Technology (MIT) is considered the leader but in engineering some would prefer California Institute of Technology (CalTech) or Stanford over any other. For MBA, some students would prefer Harvard Business School while others will go to Wharton School of Business. One side doesn't fit all in the field of admissions. You need to understand "fit". Which college is ideal for you? Which college will help you be successful in life? You will grow the best in which kind of environment? Should you go to a small college with more focused resources or go to a huge Universities with better facilities? All these factors should be considered before applying to college just on the basis of rankings.
In UK there is Oxford and Cambridge. For business, there is London School of Business, University of Bath, etc.

There is no single university which is best in all the fields. Different universities have their strengths and drawbacks. For instance, in research, Massachusetts Institute of Technology (MIT) is considered the leader but in engineering some would prefer California Institute of Technology (CalTech) or Stanford over any other. For MBA, some students would prefer Harvard Business School while others will go to Wharton School of Business. One side doesn't fit all in the field of admissions. You need to understand "fit". Which college is ideal for you? Which college will help you be successful in life? You will grow the best in which kind of environment? Should you go to a small college with more focused resources or go to a huge Universities with better facilities? All these factors should be considered before applying to college just on the basis of rankings.