Cyborg (DC Comics)
There are many amputees with artificial limbs now. There are people who regained their entire lives back because of artificial limbs. If we look at the sci-fi possibilities, these limbs could have weapons, TV screens built into arms, and other devices like Cyborg has.
Robin/ Nightwing (DC Comics)
Dick Grayson AKA Robin AKA Nightwing was a circus performer and acrobat before joining Batman. Any real world acrobat can be him.