About the list of icons proposed, in many cases it looks like there are already plenty of alternatives at Noun Project (although perhaps not CC0). In those cases the task might be more a matter of choosing an existing icon, to be used as is or as reference for a final one.
Maybe we should strive to have less evident cases where Noun Project doesn't have much / any CC0 choice yet?
I agree that the list we prioritize in the end should be mostly things that TNP doesn't already have covered for us.
The thing to take into account is that many icons on TNP require strict attribution; this event gives us a chance to produce a lot of non-attribution, public domain icons. So, I think we should mostly be MediaWiki-specific, but also think strategically about what we want to become public domain.
