Looks like you got some of the best. I'd probably add Dark Chronicle which is excellent and shouldn't be hard to get hold of. I would also get Steambot Chronicles if you can find it for a reasonable price. It might not be the best JRPG you play (because of its low budget) but you will not play another game like it. Extremely unique and I doubt there will be anything like it again.|
Also for something obscure look up Radiata Stories which I don't have but have been considering tracking down as its supposed to be pretty good! Same as Arc the Lad which is available on PSN if I recall.