mamoswine are really decent, and covers you for the ever popular tyranitar bringing in sandstream.
its always good to have just ordinary pokemon that aren't ice type, hail does 1/16th damage every turn and leftovers heals exactly the same, so you could run water types to counter your fire type disadvantage and give them leftovers and hail wont do anything, most water types can learn blizzard aswell so that's pretty cool