Suzi was never well known in the US except as Leather Tuscadero, and she's been off the radar here for years, so it's no wonder she wasn't included.
Bill Black allegedly cited Fred Maddox as an influence. So Paul Allen managed to get Fred's bass for the Experience Music Project because -- allegedly -- the first notes of rock & roll may have been played on that bass back in the mid-'30s. That's the story, but it's ludicrous. Fred Maddox wasn't the first doghouse bassist to slap, the Maddox Brothers & Rose didn't play rock & roll, and they weren't nationally known until I was little. Yet one of the authors of this list must have read about Maddox's bass at the EMP and decided he belongs on the list.
That's what I mean when I said the list was made by people who have only read about bassists.