Bruce Lee is quite clearly the best, no discussion neccesary. It's true that Jackie Chan has been learning martial arts for a long time, but so has Jet Li. You can't really compare them, they're totally different in terms of style.
IMO there's nothing really wrong with wire work... fight scenes are coreographed anyways, so they're not real fights... if they're not real fights what's the problem with using wires? It takes a lot of skill to use wires anyways, even if this skill is not the same as fighting skill. To be fair though, if you look at any fight scene where the hero is fighting off ridiculous numbers of baddies, in real life it's not really likely he'd win :P. Numbers do generally count :P.