If you mean characters that are featured on both Heroes Wiki and Villains Wiki, I can think of some right off the bat:

Cruella de Vil (Emma Stone)

The Grinch (Bendict Cumberbatch)

Bumble

Heat Miser

Snow Miser

Frankenstein's Monster (Universal)

• Venom Snake

• Big Boss (Metal Gear)

• Vaggie

• SCP-343

• SCP-049

• The Intruder (Poppy Playtime)

• The Chosen One (Animator vs. Animation)

• Yeti (cryptozoology)

• The Puppet (Five Nights at Freddy's)

• Vanny

• Gregory (Five Nights at Freddy's)

• Lusamine

• Kafka

• Junko Enoshima

• Paz Ortega Andrade

• Omori

• Aubrey (Omori)

I can only remember this ones.

Bender

Lobo

Alucard (or his Twitter account in Hellsing Ultimate Abridged, TheCrimsonFucker.)

Also, Shadow.

Basicly every team fortress 2 mercenery

Frisk(undertale)

Flowey(undertale)

Darth vader