I'm working on a project comparing abstract ballet of the mid 20th century to narrative ballet. I have lots and lots of examples of narrative ballet, but I'm having trouble coming up with more abstract ballets, other than the dozens by Balanchine. I can think of a few Robbins ballets, two Ashtons that I know of (Symphonic Variations and Scenes de ballet), and the Lopukhov Dance Symphony. But that's it. I feel more than a little ashamed of myself.
Help me, Ballet Alert! What choreographers and ballets am I missing?
You might want to give some thought to what you understand as "narrative ballet." Must it have a clear plot, characters, etc.? Must it literally "tell a story"? Many ballets convey emotion, interaction, the human condition, etc. without really having a plot. If you are defining "narrative ballet" narrowly to require a plot and dramatic characters, then start with Fokine's Les Sylphides and move forward through the century.
EDIT: I missed the "mid-20th century" requirement. Well, take a look at Tharp, Feld, Ratmansky, etc., etc. If it's performed by a classical ballet company, is that enough? If so, then look at Paul Taylor's pieces that ballet companies have performed.