Some not mentioned yet.
Magnolia = Vanilla Sky (2001), Traffic (2000)
Hurlyburly = The Long Good Friday (1980), Being John Malkovich (1999)
Primal Fear = The Ghost Writer (2010) , Michael Clayton (2007)
Donnie Darko = S. Darko: A Donnie Darko Tale (2009), Fight Club (1999)
I <3 Huckabees = Zero Effect (1998), The Moon (2009)
American Beauty = Crash (2005), American Psycho (2000) [things are not as they seem]
Things We Lost in the Fire [I’ve not seen this yet. Thank you!!!]
The Usual Suspects = Miller’s Crossing (1990), Lost Highway (1997)
Others
Network (1976)
Solaris (2002)
Oldboy (2003)
The Big Lebowski (1998)
City of Angels (1998)
@Neizvestnaya – thank you for the Jar City recommendation. Netflix instant view – watching it tonight!
@Pied_Pfeffer – have to watch The Big Blue again. Will PM about ending after I watch it again.