I know this has probably been done a thousand times, but this is in retaliation to the same thread for Marvel's fighters that just popped up.
My own list based on what I have read.
4. Tim Drake
The ones I didn't include were wondergirl and... Nope, that's probably it.
This is my list based on what I KNOW, not just the comics I've read/comics I own.
1. Karate Kid (or Batman with prep)
2. Deathstroke (in his New 52 series he says he can know your moves before you make them, a bit like Cassandra Cain, only Deathstroke is also... Well... A superhuman mega-athlete that puts Batman's athletic skills to shame in a variety of ways)
3. Cassandra Cain
5. Wonder Woman