Crossposting from the "How to make Scout better" thread:
What about Adventurer/Counterfeit? They both love trashing Copper and, later, even trashing Silver. You can prioritize Adventurer over Gold early, supposing you're content to keep doing this Counterfeit+Copper thing for a while: it'll help you cycle and hit the combo more, so the Adventurer doesn't conflict with Gold as much as usual.
And hey if you wind up a little low on Treasure later (always the Achilles' heel of Counterfeit) it's okay: Adventurer will still scrounge up your last Gold or two. As a bonus, you have +Buy so that whenever your Adventurer gives +$5 it isn't wasted.
Full disclosure: I habitually overestimate Counterfeit. But this does look fun: they seem to cover each other's weaknesses in a pretty way.