I'm sure your points are true and granted I can't think of terribly many bulky ones, but from my perspective I always hated certain Dark types as the Ghost Leader, where there are so many powerful ones running around and with Knock Off having gotten stronger.
I really don't intend to strengthen the type I oh so despise for being my biggest threat ^_^, but Mandibuzz is so good imo and bulky too. It's bully, has the ever so annoying Knock Off, Roost, can Taunt, and use Foul Play/Brave Bird. There is almost nothing in fact that can outright ohko or even thko it, and the sole reason for me having tried Kyurem-B.. ^_^
Another ripper Dark monster (on the note of cheap ones like Mega Mawile) that I absolutely despise is Bisharp. Mr. Y uses one, and it's hard to kill with STAB Sucker Punch.. sigh.