Stanford-era Dean with minimal Sam angst:

The 1300 Days (http://archiveofourown.org/works/695225) by stele 3 (this one has some Sam-related angst, but it's definitely very Dean-centric and there's none of the 'Dean is nothing without Sam' crap)

And My Flame Made a Pinnacle to Heaven (http://gekizetsu.net/sn/bonfire.html) by gekizetsu

Man's Allotted Span (https://www.fanfiction.net/s/4165502/1/Man-s-Allotted-Span) by Janissa11 (sequel to Land's End)

Highway Chile (http://art-savage.livejournal.com/18328.html) by art_savage