Wrestling moves too fast and changes too much to do this by decade. I have to say 00's just because of the year 2000 and early 2001, which were as good as WWE/F has ever been:

Benoit/Jericho
Rock/HHH
Rock/Austin
HHH/Cactus Jack
HHH/Austin
Dudleys/Hardys/E+C

Need I say more?