In what way, other than signalling the end of an era, was/is the Klipschorn influential? Besides being passed the 50 year threshold set for this list, very few speakers actually followed in it's footsteps and those that did have all fallen far from successful.
Similarly, I don't see how any small box acoustic suspension speakers need be mentioned after the AR - that WAS a speaker that undeniably spawned a large change in home audio. Did the Bose 901 spawn a lot of clones, or new designs from competitors that explored their "direct reflecting" principals? I can only think of one and it only lasted a couple years. As much as I LOVE Maggies, I don't see them as having really changed all that much of the audio landscape either. Maybe three, or four other companies tried to make similar products, Yankee, Eminent Tech and arguably Apogee come to mind, not exactly a groundswell!
I'd have to give some credit to the suggestion of the Bose Cubes & subs though. They may not have advanced the SOTA in high fidelity audio, but at least they WERE influential... much as I hate to admit it, those little sub/sat systems have actually changed the way most folks look at speakers.
As far as omissions, I'd say the Dahlquist DQ-10 is a biggie... it certainly started a major rethinking about baffles and staggering drivers for time alignment... I cant see companies like Vandersteen, Snell, or Thiel becoming what they did without the DQ-10 having got the ball rolling. Of course there have been all sorts of innovative designs that didn't really change the course of audio, AMTs, Walsh drivers, etc., but good as many were, if they didn't catch on, for one reason or another, it's hard to put them in a list of "most influential speakers".
Frankly, I don't think the author of the article has a solid understanding of what the word "influential" means.