Well, let's see where they have signed (the past 5 years, using 24/7):
23 - Alabama (which no one has suggested by name)
18 - Georgia
14 - USC
11 - Clemson, FSU, Ohio St (tie)
10 - LSU
6 - UCLA, Texas A&M (tie)
5 - Auburn
4 - Penn St, Michigan, Stanford (tie)
3 - Texas, Oklahoma, Florida, Ole Miss (tie)
2 - Miami, Tennessee, Virginia
1 - Arkansas, Miss St, Cal, Houston, Oregon, Missouri, Maryland, MSU, Baylor
0 - Duke, Northwestern, Vanderbilt, GA Tech, Notre Dame, Wake Forest, North Carolina, Wisconsin, Illinois, etc......
Strong academic institutions in bold.