Matthew Hurley (Alphas) can emit pheromones that create an aggressive behavior in people nearby.
Billy Blim (Angel) induces extreme and homicidal misogyny in any man, human or otherwise, he touches.
Andras (Charmed) can project rage in others, magnifying their anger, until they commit an act of violence
Red Power Rings (DC Comics) amplify their wearer's rage to near-mindless levels.
Arachnotaur (The Grim Adventures of Billy and Mandy) is the Spider Planet God of Anger, driving Jeff into unreasonable fits of rage.
Anger (Inside Out) is Riley's capacity to feel anger, making her feel angry whenever he's at the controls.
Dark Kahn (Mortal Kombat vs. DC Universe) is a strong user of this ability.
Serena (My Babysitter's a Vampire) is a siren and can increasing the rage of the people with her singing.
Omega (Red vs. Blue) is an A.I. fragment created from the Alpha's rage. He was implanted into the Beta aka Freelancer Agent Texas to make her more aggressive.
SCP-053 - Young Girl (SCP Foundation) can afflict anger on others as long as they either touch her, remain in her range for approximately ten minutes, or make eye contact with her.
The Accursed (Vampirella) were able to combine Medea's magic and Doctor Faustus' alchemy to transform Cain's cursed blood into a virulent pathogen that caused anyone infected with it to become consumed with homicidal rage.