[DaveBlake]

So nice to hear that you prefer the Kodi music library because it allows you to see just album artists if you want

Artist and album art has to be fetched from online sources by scraping, and I suspect that what you have done so far is simply scan the tags embedded in your music files to create the library. There is a setting "fetch online information on update", that can automatically scarpe additional artist and album info when scanning music into the library, but for various good reasons (that I have exponded elsewhere so won't repeat myself) it is disabled by default in Krypton.

To fetch art and extra info for existing artists, go to the artists node (the screen showing the long list of artists) and from the context menu click on "Query Information for All". This will go and fetch the art as a background process, you can keep using Kodi while this happens. How long this takes, how accurately artists are indentified and how much art is found will vary depending on a number of things. But for starters just try it and see. You can do similar for albums.
 

 If I see an item in the library such as an album or artist, is there a quick way to see the file path? like right click "get info"kind of thing?

From the context menu there is "Information" that brings up the Song/Artist/Album Info Dialog, but I don't know which skins, if any, show file path. Also strictly artists and albums may not have a path. Kodi will form a music library from a totally flat set of files, using the embbeded tags data, it does try to find local art for artists and albums in some obvious folder layout, but this does have flaws.
 

If I browse for an artist image, is their any plugin that will let me quickly choose and image or find one for me? Or must I manually browse by path (excruciating) for every single item. I.E. Can you scrape per item or selection of items? Fixing individual items sees very time intensive and inefficient.

Yes, the "query for all" works on the artists/albums that you have listed, so you can use smart playlist rules to limit those. Scraping art also fetches more than one image, if it finds them, then you can swap manually to one that you like.

Local art will also get picked up if they are located in the correct place. See http://kodi.wiki/view/Music_artwork
 

I am primarily interested in audio. I want to easily browse by album and artist poster. Ideally compilations should show up econ per album but each artist should also have a listing in artist view, even if they are only on one song in a complication.

That means that you want to have "show song and album artist" setting enabled. Kodi music library does all you ask, but also offers lots more in the ability to filter what you browse, make custom nodes and smart playlists.

My main use for Kodi is music too.

Is their a better skin I should be using?

That is a matter of personal choice. I use Confluence, partly because it was the default so familiar, but also it gives me better music details (Estuary music info dailog is totally useless imo). But there are lots of skins, some with much more art (and addons to fetch that art), and skinners puts lots of work into them each offering something to someone, I would not want to take sides