A rabble chain can leave the opponent with a "2 card" hand that they have no control over, and there's the pins (which are either way too hard to pull off or definitely too strong).
I'm wondering in the context of this idea:
Midas
Action/Attack - $5
Each player (including you) gains a Gold
Each other player discards his hand and puts the gained Gold into his hand.
Having enough money to buy a Silver in addition to the free Gold isn't too shabby, but the attack is brutal late game.
Nothing to see here, just a terrible card.
Another card where this comes into consideration:
Realtor
Action/Attack - $4
+1 Card
+1 Action
Each player (including you) gains a Copper. Put the gained Copper into your hand. Each other player puts the gained Copper on top of his deck.
It's all about location, location, location
Now if you stack these, the other player, has $5 to spend next turn without other attacks. That's not all that bad a turn. With a Cutpurse stack you can pin, but below $3 is still going to be quite difficult.
Edit: Put Midas in its place.