I don't think
US News and World Report has done for ballet companies what they've done for college ratings

But in the US, in most unofficial "ratings" I've seen, the top 2 are considered NYCB and ABT, which is why I think San Francisco Ballet has been so adamant about trying to gain an international reputation. To use a sports analogy, this is like Michelle Kwan beating Sasha Cohen at US Nationals for the last two years, but placing behind Cohen at the World Championships, and SFB wants to be Sasha Cohen.
Of the "regional" companies -- i.e., everyone but NYCB and ABT, I don't think there'd be that much argument among people who've seen many US companies that SFB, Pacific Northwest Ballet, Houston Ballet, and Miami City Ballet would be in the Top 10. What's common to them all is a strong artistic vision and longevity of Artistic Directors, although eyes are on Houston to see if what changes the newish artistic leadership will bring, and would have been on PNB, had Boal not been chosen. Pennsylvania Ballet and Boston Ballet have had their ups and downs over the years, but they're fairly well known and seem to be on the upswing. Pittsburgh was making a run for it under Patricia Wilde, but seems to have artistic and financial issues now.
Living on the West Coast, I've been able to keep an eye on two companies who are turning to a more classical rep: Ballet Arizona under Ib Andersen and Oregon Ballet Theatre under Christopher Stowell, and they are both on the rise.