It's not a coincidence that during the late 90s Kafelnikov, Rios, Rafter and Moya were considered a weak #1. These players would never be #1 in Roger's era.
I find it funny that Sampras fans even try to counter the weak/strong argument when it's clear that Sampras had a weaker field.
Tier1(goat): Federer; Tier 1.5: Laver, Gonzales, Sampras, Nadal, Borg;
Tier 2: Lendl, Connors, Rosewall, Tilden; Tier 2.5: McEnroe, Agassi