Great update, Piper.
just few thoughts though to get a bit of discussion going more than anything:
*Orange Juice seem the biggest omission to me.
*The Cardigans I think are also an omission. They were the ones who allowed the Swedish indie movement to gain popularity in the UK and US. I think Peter, Bjorn and John are way too high too (most of their popularity/acclaim seems to be based largely on one song). Personally I'd put them behind both The Cardigans and Jens Lekman as Swedish indie artists go.
*Morrissey (as a solo artist) should definitely be on here somewhere as well.
*Still unsure as to whether or not to consider Orange Juice for the indie pop list, see you haven't included them here, is that just an oversight or would you not consider them for this list?
*I'm not sure the Trashcan Sinatras should be on here, I have them really low on my indiepop list, unless you know more about them than me, but idk, they always seemed like a very minor band to me?
*I think the Olivia Tremor Control and The Apples in Stereo look too high. I know there is a lot of love for Elephant 6 as a label but as individual artists there seems to be plenty of artists below them who are much more popular/acclaimed/influential.
*The Kooks and Maximo Park seem like a bit of a weak entries, they were minor bands who were big over here for a very short period. I would think the Futureheads are more deserving as recent UK bands go.
*Tiger Trap could be considered toward the end of the list, if you've got 2 Amelia Fletcher bands on here, I think its fair to put Rose Melberg band on too, seeing as they both share very similar fanbases/followers and are often seen as "friendly rivals".
*Are you including slowcore? If so, I would've thought Red house Painters would be on here ahead of Low, Cat Power and Codeine. I also think Low look way too high. American Music Club could also be included being the founders of slowcore.
*Agree with you on not including the Stone Roses and including the Strokes, I would include the Pixies (and have them at #1) myself, but not Slint or the Animal Collective.
Looking forward to the updated greatest indie rock songs list too.