Sorry, but Ray Davies is very widely recognised as being one of the best song writers this country has ever produced. Whether those songs are on albums or singles is immaterial in the context of this thread, the fact is that The Kinks are widely accepted as being one of the best bands of the sixties.
Ditto The Small Faces for that matter, lesser geniuses than Davies, but still....
Perhaps it's because I'm day to day on the edge of a scene that thrives on the sixties music scene that I can see it, but I think - as stated above by Vastman - they're widely quoted as influences, Madness being another band that have regularly cited them as major players in their origins.
I suspect that this is the crux of the matter though, if you're a fan of a particular music scene, then you're going to be more knowledgeable that someone who's just familiar with the name.
I can't comment on KLF for this reason, but a mate reckons that their legacy is immense. I can't see it myself, but I'll take his word for it.