Escpecially Roland Garros 1994 is a nice one.
So far: 1988 (RG, UO), 1989 (RG, UO), 1990 (AO, RG), 1991 (all slams), 1992 (RG, WB, UO), 1993 (RG, WB, UO), 1994 (AO, RG).
I'm waiting for more
1990 U.S. Open too
I will add Slams from Wimbledon 94 to RG 98 and then I will post the rest of missing 80s Grand Slams.