My ignorance is showing.Thx.
That being true, I'd agree, there's a decent chance they are bigger.
Here's the thing: the discovery that the Monkees didn't play their instruments and the fallout from it has a chance of being bigger too. It was probably the biggest scar on the Monkees, and one that was serious and did linger, even despite the fact that they wanted to play their own instruments but were forbade to for the first two (?) albums, and they played their own once they got creative control.
And there's the fact that once the Monkees were writing their own material, as time passed the hits were not coming anymore. That could be offset if they were bigger, since a hit song is often just one because people are exposed to it enough. Or it could be the case here.
And you do also have the fact that the Monkees were losing popularity as time went on, and could be classified as a fad.