It is indeed no big task to meet Kevin's challenge on post 1962 music.
My own list includes much already menioned- but I will add
Panufnik- Arbor Cosmica
Norgard - Third Symphony
Maw- Odyssey, Violin Concerto
Ruders- Second Symphony
Schnittke- Viola Concerto, Concerto for Piano and strings
Rzewski- The People United will never be defeated
Bernard Chasan