Would you consider Japan, UK, & Germany in the conversation?
Kinda. If you add up all three combined you have a similar population to the US (and a little over half the GDP). Japan and UK are #12 and #14, which I don't consider that different from #18. Germany is #7, which is the only country of any comparision that significantly tops us on that chart.
There's not a single country in that top 6 that is more populous than the state of California. We have four states (CA, TX, NY, FL) that each individually have a similar population to 4 of the COMBINED top 6.
And this is of course assuming that list is accurate. The fact that China ranks #34 is laughable.