Wait, so the Kinks "experimented to the point where you wouldn't call them pop," but the Beatles are the only British Invasion band that you would call "pop"? Aren't you kind of contradicting yourself? The Beatles evolved into one of the most experimental band of their time.
Yeah, but I'm talking in terms of releasing music at any point that could be considered pure pop. As in, early Beatles stuff was just straight pop music, whereas even early Kinks stuff had more blues and hard rock influences.
In later years The Beatles were unquestionably more experimental (though not necessarily better) than the Kinks, but their initial output was pop music, plain and simple.
Catch my drift?