favorite mlp antagonist? [open discussion]

here's an open question: who's your favorite my little pony antagonist and why? it can be from any generation, major or minor character. 38o

i'll go first; i will always and forever be a trixie lulamoon defender. she wasn't a very prominent character until later seasons and i feel her character, especially the development of it, is so real. her story showed a real example of anger honing from insecurity and jealousy. i feel like that's important to learn in any kids show- that your motives or lack thereof shouldn't drive your emotions.