“Undergraduate focus” is a hard thing to define and then to measure.
One relevant metric is average class size.
http://publicuniversityhonors.com/2015/10/20/estimated-class-sizes-more-than-90-national-universities/
(notice the way this site measures class size, though, which isn’t the same way everyone else would do it).
Another perspective emphasizes professor quality and the level of student-faculty engagement:
http://www.bestcollegereviews.org/50-schools-best-professors/
The NSSE attempts a more complex, multi-faceted assessment of student-faculty engagement
(http://nsse.indiana.edu/html/annual_results.cfm).