This is my opinion and unrelated to the Bracket Matrix and its seeds.
1 - Gonzaga, Baylor, Illinois, Michigan
2 - Alabama, Ohio State, Iowa, Houston
3 - Texas, Oklahoma State, Arkansas, Kansas
4 - West Virginia, Purdue, Virginia, Florida State
5 - Villanova, Creighton, Tennessee, Texas Tech
6 - USC, Colorado, LSU, San Diego State
7 - BYU, Wisconsin, Clemson, Loyola-Chicago
8 - Oregon, Oklahoma, Missouri, UConn
9 - St. Bonaventure, Florida, UNC, Georgia Tech
10 - Rutgers, Virginia Tech, Maryland, VCU
11 - Michigan State, Louisville, UCLA, Utah State, Wichita State, Syracuse
12 - Winthrop, UC Santa Barbara, Georgetown, Oregon State
13 - Liberty, North Texas, UNC Greensboro, Ohio
14 - Abilene Christian, Morehead State, Colgate, Eastern Washington
15 - Cleveland State, Grand Canyon, Drexel, Iona
2 - Alabama, Ohio State, Iowa, Houston
3 - Texas, Oklahoma State, Arkansas, Kansas
4 - West Virginia, Purdue, Virginia, Florida State
5 - Villanova, Creighton, Tennessee, Texas Tech
6 - USC, Colorado, LSU, San Diego State
7 - BYU, Wisconsin, Clemson, Loyola-Chicago
8 - Oregon, Oklahoma, Missouri, UConn
9 - St. Bonaventure, Florida, UNC, Georgia Tech
10 - Rutgers, Virginia Tech, Maryland, VCU
11 - Michigan State, Louisville, UCLA, Utah State, Wichita State, Syracuse
12 - Winthrop, UC Santa Barbara, Georgetown, Oregon State
13 - Liberty, North Texas, UNC Greensboro, Ohio
14 - Abilene Christian, Morehead State, Colgate, Eastern Washington
15 - Cleveland State, Grand Canyon, Drexel, Iona
16 - Oral Roberts, Hartford, Mount St. Mary's, Norfolk State, Appalachian State, Texas Southern