As video game-related animation art is added to OVGA, we've discussed a little how to best handle the artist field. Likely the best "person" to credit is the actual animation studio versus a specific individual. So for example for your Night Warriors one, I updated that from Unknown to Madhouse Studios, who I also added as a credited artist for the Aeon Flux piece. Similarly, crediting Don Bluth Studios (rather than Don Bluth himself) for the Dragon Lair and Space Ace cels. For the two Fatal Fury cels you've uploaded, I'd be inclined to credit them to Studio Wombat. I'm not sure whether Masami Obari would have had a hand on these, but then again, he was the Director, Character Designer, and Chief Animation Director for the film