The most aggressive bees I tend to encounter are male carpenter bees. They are highly territorial and they'll even buzz a human to scare them off. However, there's no threat.

No threat of stinging, anyway. They will absolutely wreak havoc on a wood framed house.

bzzzzbzzzBZZZZZ

Yes, sir, I see you. I see your little pile of sawdust on the fence, too. No, I'm not going to screw with it. I'm just installing this gate latch."

bzzzbzbbzbbzbzbzbzbzzzzz

This would go a lot faster if I didn't have to keep ducking.

BZZZZZZ

Okay, I'm done, jeez.

BZZZZZzzzbzzzz^bzzzz^

...aaaaand under the fascia board it goes. Shit.