Embry-Riddle, if you look at their website, does state that they have been ranked the #1 Aviation College in the US. However, they are not currently ranked #1.
thebestcolleges.com ranks Hallmark College as #1 for aviation.
The school was established in 1969 and is a private college. It has instructors who are well trained and have achieved multiple degrees/titles in aviation. They offer a variety of programs--both associate and bachelors--and can offer a program that provides students with a degree and their pilot's license in 15 months.
Embry-Riddle Aeronauticle University in Prescott, AZ