For Batman it's hard to put a exact number on it, but he's more skilled than Bane, who is equal to Ra's Al Ghul and comparable to his father, who was considered the most dangerous man in the world for a time. Ra's Al Ghul is the Leader of the League of assassins and has been honing his and their assassin techniques and combat skills for centuries. Ra's Al Ghul is around. Batman is also above pretty much all the Robin's in skill, casually beating at least one of them using nothing but Indian martial arts and no other techniques. As such, he's also above Nightwing who has learned all martial arts and is a master combatant with enough skill to catch a running
Flash (Wally West) (Post-Crisis) and who is in turn above Damian Wayne and Tim Drake. Tim Drake also beat Bane's dad back when he was a Robin and casually defeats people on the level of
Green Arrow (Post-Crisis)'s skill and Jason Todd. Damian is also above Jason Todd and can do stuff like casually hitting multiple bullseye's with a arrow while blindfolded and was trained from practically his moment of birth by the League of Assassins whom he far surpasses. Jason Todd himself is no pushover and can do stuff like beat Man-Bats who have trained under Lady Shiva (another super skilled martial artists) and defeat
Deathstroke (Post-Crisis) while both were injured (although that's still a huge skill feat for Jason, since Deathstroke is generally considered to be too strong AP wise for anyone in the Bat-family to hurt under normal circumstances), among the usual casually skill stomping master martial artists and combatants. Green Arrow himself has a huge list of feats and is more skilled than Deadshot, Master mercenary yada yada yada, who's also equal to Deathstroke in skill, who when young and inexperienced could easily kill 38 soldiers in two minutes, defeat many comparable armored soldiers while losing his powers and massively weakened, and has massive amounts of experience in his own right, and was a veteran soldier as well. Cassandra Cain is also somewhere in here, and without her
Precognition she's easily beaten by Batman, and she can easily do stuff like stop her own heart (insert Ikki meme here) and was trained from birth to know nothing but violence to the point where she had achieved a level where high level master combat and violence itself was as basic and instinctive as making noises with your mouth.
This is the sort of training she went through.
Admittedly, the scaling has a bit of fluidity due to standard DC inconsistency, but that's the best way to summarize it in general.
Additionally, it should probably be Characters from
DC Comics. I can elaborate if you want.
