People rate Fed's bh only against Nadal, but they should compare to the rest of the players on the tour. Should we rate Pete's serve on slow surface or clay and ignore the fast surfaces? No, they should see the whole picture. Also, Fed is playing in a current condition that is the toughest for a 1 handed backhand. Had he played in the 90s or before, it would be even better.
Tier1(goat): Federer; Tier 1.5: Laver, Sampras, Nadal, Borg;
Tier 2: Lendl, Connors, Rosewall; Tier 2.5: McEnroe, Agassi