Okay, well how does this sound?
It will have anywhere from 70-80 attack, and 60-90 special attack. Deoxys speed has base 90's. It's actually pretty balanced. By no means will it be SOLELY utility. It's going to be able to attack as well, and as far as any utility pokemon goes, they usually run two attacking moves for coverage. Taunt will by no means cripple this pokemon. Taunt will force it to switch out or attack.
And don't compare utility moves to garchomp. Garchomp wrecks your shit. Utility supports your team. AND for your information, garchomp has something to protect it's ass, it's called yache berry. Not to mention sand veil gives it a 25% evasion chance.
Now this pokemon, it's got 1 weakness, 1 immunity, and 4 resists, on top of absorbing toxic spikes and resisting stealth rocks. However, bronzong WALLS THE SHIT out of it, with DOUBLE IMMUNITY to both it's STAB's. It's got average attacking stats, good defenses and good speed. It doesn't need a million counters, it's weaknesses are already known. This is supposed to be a team supporter pokemon, so why not give it an ability which helps it's team?