Oh there are so many wonderful Joker stories out there. If I linked them all, this would take up a whole page! :3 So I'll just link my three 'ultimate' Joker stories. Seriously, I hero-worship these. They are just, argh:
These are the only two I've read, but they're both amazingggg. Can't ever get enough of the Joker ;) http://www.mibba.com/Stories/Read/497635/When-in-http://www.mibba.com/Stories/Read/484121/Crossroads//
Yes yes I do know one that is highly recommended! This one should make you all happy and wanting more and more! That is the only other Bane story that I will say is the greatest of all time.