To me, team/postseason success is absolutely a huge factor for getting your jersey in the rafters. Unless you have some unbelievable NBA career, I don't think being a great player on a bad team merits the honor.
Hunter would be a no in my mind. Honestly, Jamerson is borderline due to the teams of that era. If it was my call, he's probably not up there.
Cooper is a definite "yes" with 2 NCAA trips. Tony needs to have a year for the ages to be in consideration.
Look at the run of the Player of the Year winners over this 17 year stretch in the MAC. Pretty impressive. The younger folks have no idea how good the league was in the 90s.
1983–84 John Devereaux Ohio Center Senior [1]
1984–85 Ron Harper Miami Shooting guard Junior [1]
1985–86 Ron Harper (2) Miami Shooting guard Senior [1]
1986–87 Booker James Western Michigan Small forward/Shooting guard Senior [1]
1987–88 Grant Long Eastern Michigan Power forward Senior [1]
1988–89 Paul Graham Ohio Small forward/Shooting guard Senior [1]
1989–90 Dave Jamerson Ohio Shooting guard Senior [1]
1990–91 Marcus Kennedy Eastern Michigan Power forward Senior [1]
1991–92 Lewis Geter Ohio Small forward Senior [1]
1992–93 Gary Trent Ohio Power forward Freshman [1]
1993–94 Gary Trent (2) Ohio Power forward Sophomore [1]
1994–95 Gary Trent (3) Ohio Power forward Junior [1]
1995–96 Bonzi Wells Ball State Small forward Sophomore [1]
1996–97 Antonio Daniels Bowling Green Point guard Senior [1]
1997–98 Bonzi Wells (2) Ball State Small forward Senior [1]
1998–99 Wally Szczerbiak Miami Small forward/Shooting guard Senior [1]