I think another band that has the potential to break into the mainstream like Fun. did and become "classic" is Marianas Trench. I have a feeling whatever they have up their sleeves next could be the defining album for them. Especially after their singer hit it big writing Call Me Maybe.
Really think this list is more of a "what albums will ap.net think are classics in 10 years?" In the scheme of things, Some Nights is the only album on this list that your average person in 2020 will have even heard of. That being said, for me personally, War Paint and The Upsides are, and always will be, albums that represent defining moments in my life, so I will remember them for that.