No, in that case you need permissions or licensing from the rightsholders to resell or otherwise profit en masse from their work.

>Zero access except for the person who created the archive?

This is, fundamentally, what archiving something means. It is legal for someone to rip a music CD that they own for archival purposes, but it is illegal to share the resulting archives.

>The archivist needs to vet potential accessors for certain motives?

One facet of fair use is whether the use is for academical, educational, or other non-profit purposes. So yes, the archivist needs to vet potential accessors for certain motives.

>Only offer access to small samples?

Another facet of fair use is that only the minimum portion required from a given work is used for a given purpose under fair use. For example, quoting certain passages and only those passages in a book to discuss them in a review or critique, etc.

I completely disagree, you can't separate archiving from the accessibility of the content, the whole point of why you are archiving something is to make sure it's not lost and future generations can still access it in the first place!