Vanilla songs and easy listening songs always make it to #1. The best music is always appreciated by only a portion of the people so it never gets to #1. In the same way that “Threes Company” and became #1 TV hits. Pure trash but appealed to a wide base of people. Meanwile, awesome shows like Twin Peaks, Eli Stone, and Starter Wife get cancelled after 2 years.
That's why I never presume to define "best" or "worst" of anything.
There is nothing more arbitrary and presumptuous as making a universal statement like that, out of a personal opinion.