Joker (DCEU)

The Joker is an extreme and infamously formidable psychopathic criminal from Gotham City, being at the very top of the city's criminal underworld, greatly feared by other crime bosses. Devoid of empathy or pity for anybody taking part in his wicked schemes either by intimidation or fraud, the Joker does, however, adore his girlfriend and partner in crime Harley Quinn, doing his utmost to rescue her from the Suicide Squad and clutches of Amanda Waller, with eventual success. The Joker is perhaps most infamous for his various duals with Batman, who almost retired after Joker murdered the vigilante's ward Robin.

Battle vs. The Joker (Nolanverse) (by Elgb333)
TBW.

Expert's Opinion
TBD.