Rogie hasn't won the most of any of the GSs.
Agassi has 4 AOs, Rogie has 3.
Borg has 6 FOs, Rogie has 1.
Sampras has 7 Ws, Rogie has 6.
Connors, Sampras, and Rogie are all tied with 5 USOs.
I think Rogie's chances from best to worst to have the most of each GS is: USO, W, AO, FO.
See I hate predictions like these, there so unlikely that they are almost never right. But when they are right, you look like a genius. So you have nothing to lose!