I'll take Glen Rice along with Thompson. His career 3-pt % was .480, the highest for any UM basketballer making at least one 3-pointer per game, and his overall FG % was .569, which puts him in third place all-time for UM. The two guys ahead of Rice in overall FG% are Webber and Ron Kramer, both of whom had only half or less the number of attempts that Rice had. If Beilein had two guys like Rice and Thompson on the squad, we'd have 4 more wins easily.
It would be especially nice to have a Rice around at tournament time. He still holds the NCAA tournament record for most points, most field goals and most 3-pointers in a single year's tournament.