Lord Valtasar

I'm not the biggest Pinkie Pie fan(she's awesome don't get me wrong,just like some of the others better), but I give credit where credit's due so this came to be:

Pinkie represents all of the elements of harmony, better than the others in most cases

Laughter: lets just get this one out of the way as its basically all she does, moving on
Honesty: as far as i'm aware, she always tells what's on her mind,(though its not always comprehensible)
Generosity: she has basicaly devoted her entire life to making other ponies happy,i don't know what could be more generous
Kindness: again, her whole life's purpose is to lift other's frowns and help them emotionaly
Loyalty: Pinkie promises. nuf said
Magic: here is where it gets kinda shaky, but her strange powers (pinkie sense, and all the unexplainable things she does)could be called magic with a bit stretching