Watt (Paper Mario) can generate powerful electricity.
Thanks to the power of the Rumble Rumble Fruit/Goro Goro no Mi, Enel (One Piece) became a Lightning Human which allows him to generate and create an endless amount of electricity.
Trafalgar D. Water Law (One Piece) can generate a powerful electrical surge...
...via his Counter Shock technique.
Minks (One Piece) generating their Electro ability.
Mikoto Misaka (A Certain Magical Index) can generate as much as 1,000,000,000 volts...
...and upon being forced to become level 6, she was able to strike an enormous lightning which was recorded to being the largest lightning strike in all Academy City and she was only about 2% developing to level 6.
Kanon Ozu (Coppelion) had an eel gene inserted into her, allowing her to generate and control electricity.
Jackie Chun (Dragon Ball) using his Bankoku Bikkuri Shō to generate about 20,000 volts of electricity.
Electrivire (Pokémon) can generate electricity for attacks like Thunder Punch.
Fu Chi'en (Tenjho Tenge) can draw electricity from the earth and utilize it as he wants, so long as his feet are rooted to the earth.
Sasuke Uchiha (Naruto) generating his Lightning/Raiton chakra...
...infusing it into his blade to enhance its cutting ability.
Hitomi (Code:Breaker) generating electricity.
Toki (Code: Breaker) using electromagnetism to create electricity.
Thor Odionson (Marvel Comics), the God of Thunder.
Max Dillon/Electro (Marvel Comics) possess the ability to bodily generate electrostatic energy which he could release or harness for a number of effects.
Noriko Ashido/Surge (Marvel Comics)
Danielle Blunt/Aftershock (Marvel Comics)
Nahrees (Marvel Comics)
Victor Mancha (Marvel Comics)
Elle Bishop (Heroes) generating electricity.
Sylar (Heroes) generates electricity to regain control over his body from "Nathan".
Elle (Heroes) teaches Sylar how to use her ability.
Sandra (Los Protegidos)
Jin Kazama (Tekken Series)
Dash Gardiner (Witches of East End) electrocutes man.
The Electroids (Mixels)
Krell (Charmed) shooting electricity.
Garnet (Steven Universe) generating electricity to charge a car battery.
Zapfish (Splatoon) are used by both the Inklings and the Octarians as a source of renewable power.
The Great Zapfish (Splatoon) generates enough electricity to power the entire city of Inkopolis.
Denki Kaminari's (My Hero Academia) quirk "Electrification" allows him to generate electricity from his body.
Galian's strongest ÄRM, Guardian ÄRM, Torpedine (Marchen Awakens Romance) is said to be able to generate the most deadly lightning.
As a god of lightning, Baal (The Wicked + The Divine) has power over lightning and electricity...
...including using it for deadly force.
Having possessed his powers for decades, Kessler (inFamous) has a near unlimited reserve of electricity, not needing to recharge during battle.
Yellow Diamond (Steven Universe) can generate an electrical force that can destabilize a gem's form.