The MLP:FiM wikia. Pure gold. That list is for minor characters. Major players have their own page: http://mlp.wikia.com/wiki/Characters
You can make any pony a gijinka with some creativity and imagination. However, it's a different story if you want to be largely recognized versus if you are okay with only being recognized within the community.
I second Photo Finish. Just remember the huge glasses. Bonus: You get to "make zee majiks" whenever you stumble across a Fluttershy!
Other fan faves include Octavia (black hair) and Derpy (blond). But if you're Derpy, expect to be asked for a lot of muffins. Or mail.
Hope this helps.