All of the foods you listed can certainly be aggravating, but I think there are many more. Although it won't make your symptoms go away completely, a low-residue diet can be very helpful. It is definitely easier to digest. Try googling it for a list of low-residue foods.
Katie, 30. Chicago 'burbs.
DX: Pancolitis as of 9/08 (Proctitis as of 1/08)
Current Treament: Asacol 800 MG 2X daily, Iron 325 MG 2X daily, Zoloft 50 MG daily, Multivitamin.
Diet: Spinach/sunflower and low-residue.
Previous Treatment: Canasa suppositories, Cortifoam, Prednisone, Colazal, Symex DuoTabs, Rowasa, Bentyl, Cortenema.
Status: Near total remission