Tumblr is one of the best places to find good fcs, especially if you're new to the RL fc hunting scene. For anime ones, it's a little harder cause unlike RL ones where the celebrities you might choose to represent your character change their looks quite frequently, drawn ones are just that: they're drawn. You might get lucky for different art styles and fan art, which I personally have no problem with since we aren't making any money off of them (some might disagree but meh fuck em). 

Anyway, I'm getting off topic. Tumblr and Pinterest are the two most popular places you might find what you're looking for.