Steel-type moves aren't exactly the most meta relevant of the bunch, but depending on how good Meteor Mash is (it's highly likely that'll be it's CD move), Metagross could secure itself a place as a very strong generalist, given it's high attack, defense, and excellent typing.
That said, Metagross will likely also be the best steel type by a mile until we get Dialga and see what moves it has access to.