Interesting classification. I would have said that Belle and Sebastian are more typical of the brit-ska approach of “invite as many people as you can to keep them out of the UB40 lines” – however, it has never stopped being Stuart Murdoch’s project. Neutral Milk Hotel has been described as “whomever Jeff Mangum was currently staying with”. Definitely Bon Iver.
Based on this classification, I’d also be tempted to throw in lo-fi artists like Loney Dear and Guided by Voices.