For me, the issue of 'ranking' was a personal one. Specifically, which schools have consistently placed graduates in residencies that I was interested in as well as first-time board pass rates. With a little work you can get these stats from just about any school. I was accepted to several schools, including those on US News's 'top - whatever'. In fact, I chose an osteopath program (AZCOM) over MD schools specifically because of my above listed criteria. I could give a rat's a** less what someone else thinks of the institution I attended. What matters to me is ability; step up or beat it.
If, however, you need some name-dropping power due to personal or anatomical deficits, my 'simple' osteopathic school has sent graduates to Johns-Hopkins, Mayo, UMass, Albert Einstein (PA), Cleveland Clinic, St. Joseph's (CT), UCSF, etc, etc, etc, etc. This is since 2000.
Bottom line, it's about YOU and what you can do. One school's education won't bump board scores up 30% versus another school's education. Good, bad or otherwise, the MCAT is good for (at least)1 thing: predicting how you will perform on the next standardized test, Step 1 USMLE (or COMLEX). So if you are worried about matching into a pediatric cardiothoracic surg w/ a transplant postfellow or some other super subspecialized crazy narrow scoped line of medicine, well then, you better be able to put up some scores, period.