Nice mentions on this thread.
Here are some more (a couple of repeats maybe):
Wilco - try Summerteeth, Yankee Hotel Foxtrot, Sky Blue Sky
White Stripes - anything really
+1 Okkervil River - someone mentioned them above, try the Stage Names
The Sleepy Jackson - not new, but Lovers is great album
The Flaming Lips - I like the older stuff, but try Yoshimi
Black Keys - I see you have Dan Auerbach on your list already
The Decembrists
+1 Calexico
Spoon
Mumford & Sons - I really dig these guys
Here are some more (a couple of repeats maybe):
Wilco - try Summerteeth, Yankee Hotel Foxtrot, Sky Blue Sky
White Stripes - anything really
+1 Okkervil River - someone mentioned them above, try the Stage Names
The Sleepy Jackson - not new, but Lovers is great album
The Flaming Lips - I like the older stuff, but try Yoshimi
Black Keys - I see you have Dan Auerbach on your list already
The Decembrists
+1 Calexico
Spoon
Mumford & Sons - I really dig these guys