There are a few things you might try. Instead of using the search feature, you can select browse, and filter by tags instead. For instance "rpg, character", and tell it to only search 2d art. One potentially helpful tag is "lpc" for liberated pixel cup. There are very many high quality SNES-like top-down RPG characters.

You can also look through collections that other users have compiled. There are many RPG and tilesize/style specific collections.

There is also another search page which may perform better than the standard search feature, though I don't know why.

Finally, I sometimes use Google image search for "opengameart rpg character spritesheet" - it is usually faster than the site search, and may provide better results.

Enemies and character: http://opengameart.org/content/enemies-and-characters-pixel-art

Static (side view) characters: http://opengameart.org/content/sideview-pixel-art-rpg-enemy-sprites

Platformer: http://opengameart.org/content/platformersidescroller-characters-and-ene...

Top Down: http://opengameart.org/content/top-down-2d-jrpg-32x32-characters-art-col...

Hi,

Have you already check this one. graphicriver.net and mobilegamegraphics.com both of them has a very nice 2D sprites.