How quickly people have forgotten. Federer is the only player to win the AO without dropping a set since the establishment of the ATP.
And about the rubbish competition argument, one can argue Nole wouldn't have beaten Safin in 2005, and he would be sitting on 3 AO. If 2005 Federer had Murray instead of Safin, he would have 5 AO by now.
Tier1(goat): Federer; Tier 1.5: Laver, Gonzales, Sampras, Nadal, Borg;
Tier 2: Lendl, Connors, Rosewall, Tilden; Tier 2.5: McEnroe, Agassi