steel is good, but you don't see many steel pokemon being fast, aside from scizor and skarm. there's steelix, who's defence buffed, and if you can manage to BP some speed over there, you'll have the best physical wall in the game.
normal is well.... normal. several pokemon can learn special moves like ice beam and thunderbolt, so that helps. there's only one weakness there too, so it's a competion.
then there's dark, but the only worthwile dark move is crunch, so it isn't that great, despite the single weakness.
in a tournament, this is how things would most likely unfold:
1.normal 2.steel 3.dark
If you see me posting, it's because I've been asked to. Which I guess would mean I'm taking requests.